# Forever vs. Infinity — What's the Difference?

By Tayyaba Rehman & Fiza Rafique — Updated on April 23, 2024

**Forever refers to an indefinite, unending duration, often used in a temporal context; infinity, on the other hand, is a concept in mathematics and philosophy that denotes something without any limits.**

## Difference Between Forever and Infinity

### Table of Contents

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## Key Differences

Forever is commonly used to describe a period that extends indefinitely into the future, often used in everyday language to express an unending duration. Infinity, however, is more abstract and used primarily in mathematics and physics to represent a quantity that exceeds any assignable quantity or count.

Forever captures the essence of time that never concludes, frequently found in poetic and romantic contexts. Infinity is not restricted to time alone; it also encompasses endless quantities or dimensions in mathematical spaces.

Forever can apply to scenarios within human understanding and experience, such as a promise to last "forever." Infinity extends beyond human tangible experiences, often challenging to fully comprehend or visualize.

Forever has practical implications in literature and daily speech, emphasizing permanence or long duration. Infinity plays a critical role in theories and equations in physics and mathematics, providing essential understanding of limitless concepts.

Forever suggests a continuation within the known universe and human life. Infinity expands into theoretical constructs that may not have physical or practical representation, such as infinite sets in mathematics.

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## Comparison Chart

### Primary Use

Temporal contexts

Mathematical and philosophical

### Implication

Unending time

Limitless quantity or dimension

### Context of Use

Everyday language, literature

Mathematics, physics

### Human Comprehension

Within human experience

Often beyond practical understanding

### Example in Sentence

"Their love lasted forever."

"The universe is infinite."

## Compare with Definitions

#### Forever

Lasting for an infinite amount of time.

She promised to love him forever.

#### Infinity

A quantity greater than any assignable or countable number.

The series approaches infinity.

#### Forever

For an indefinite period.

They decided to part ways forever.

#### Infinity

In calculus, a concept used to describe limits that do not exist.

As x approaches zero, the value of 1/x approaches infinity.

#### Forever

Continually recurring.

He seems to be forever fixing that car.

#### Infinity

Endlessness, unlimited space, extent, or size.

The universe stretches into infinity.

#### Forever

Perpetually, always.

She's forever grateful for the help she received.

#### Infinity

A point in the distant universe that can never be reached.

He stared into the infinity of space.

#### Forever

Endlessly, without end.

This meeting feels like it's going to last forever.

#### Infinity

A state of being limitless or unbounded.

The possibilities with this technology are infinity.

#### Forever

For everlasting time; eternally

No one can live forever.

#### Infinity

Infinity is that which is boundless or endless, or something that is larger than any real or natural number. It is often denoted by the infinity symbol shown here.

#### Forever

At all times; incessantly

Was forever complaining about the job.

#### Infinity

The state or quality of being infinite

The infinity of space

#### Forever

A seemingly very long time

It has taken forever to resolve these problems.

#### Infinity

A number greater than any assignable quantity or countable number (symbol ∞)

The transmission approaches 100% as the frequency tends to infinity

#### Forever

(duration) For all time, for all eternity; for a lifetime; for an infinite amount of time.

I shall love you forever.

#### Infinity

The quality or condition of being infinite.

#### Forever

For a very long time, a seeming eternity.

We had to wait forever to get inside.

That was forever ago.

#### Infinity

Unbounded space, time, or quantity.

#### Forever

(frequency) Constantly or frequently.

You are forever nagging me.

#### Infinity

An indefinitely large number or amount.

#### Forever

An extremely long time.

I haven't seen him in forever!

#### Infinity

(Mathematics) The limit that a function is said to approach at x = a when (x) is larger than any preassigned number for all x sufficiently near a.

#### Forever

(colloquial) A mythical time in the infinite future that will never come.

Sure, I'd be happy to meet with you on the 12th of forever.

#### Infinity

A range in relation to an optical system, such as a camera lens, representing distances great enough that light rays reflected from objects within the range may be regarded as parallel.

#### Forever

Permanent, lasting; constant, perpetual.

#### Infinity

A distance setting, as on a camera, beyond which the entire field is in focus.

#### Forever

Through eternity; through endless ages; eternally.

#### Infinity

(uncountable) endlessness, unlimitedness, absence of a beginning, end or limits to size.

#### Forever

At all times; always.

#### Infinity

A number that has an infinite numerical value that cannot be counted.

#### Forever

For a limitless time;

No one can live forever

Brightly beams our Father's mercy from his lighthouse evermore

#### Infinity

An idealised point which is said to be approached by sequences of values whose magnitudes increase without bound.

#### Forever

Seemingly without interruption; often and repeatedly;

Always looking for faults

It is always raining

He is forever cracking jokes

They are forever arguing

#### Infinity

(uncountable) A number which is very large compared to some characteristic number. For example, in optics, an object which is much further away than the focal length of a lens is said to be "at infinity", as the distance of the image from the lens varies very little as the distance increases further.

#### Forever

For a very long or seemingly endless time;

She took forever to write the paper

We had to wait forever and a day

#### Infinity

The symbol ∞. Category:en:Infinity

#### Infinity

Unlimited extent of time, space, or quantity; eternity; boundlessness; immensity.

There can not be more infinities than one; for one of them would limit the other.

#### Infinity

Unlimited capacity, energy, excellence, or knowledge; as, the infinity of God and his perfections.

#### Infinity

Endless or indefinite number; great multitude; as an infinity of beauties.

#### Infinity

A quantity greater than any assignable quantity of the same kind.

#### Infinity

That part of a line, or of a plane, or of space, which is infinitely distant. In modern geometry, parallel lines or planes are sometimes treated as lines or planes meeting at infinity.

#### Infinity

Time without end

## Common Curiosities

#### How is forever used in literature?

In literature, forever is often used to emphasize themes of eternal love, loyalty, or ongoing scenarios.

#### How does understanding infinity help in mathematics?

Understanding infinity helps in dealing with concepts like limits, infinite series, and unbounded functions in mathematics.

#### Can forever and infinity be used interchangeably?

While both imply boundlessness, their contexts differ; forever is temporal and more tangible, infinity is broader and often abstract.

#### Is infinity a number?

Infinity is not a number but a concept in mathematics denoting something without any limit.

#### Can something be forever in reality?

Practically, nothing is forever in the absolute sense, as everything is subject to change or end, though the concept expresses enduring beyond usual limits.

#### What is the main difference between forever and infinity?

Forever primarily relates to an unlimited duration of time, whereas infinity refers to a limitless quantity or extent beyond just time.

#### Is the concept of forever realistic in scientific terms?

Scientifically, forever is not realistic as it contradicts the observable changes and endings in the universe.

#### How do poets use the concept of forever?

Poets use forever to evoke deep emotions and the idea of enduring love or eternal qualities in their works.

#### What are practical examples of forever?

Phrases like "friends forever" or "forever young" are practical uses in everyday speech to imply long-lasting or permanent states.

#### Are there different types of infinity in mathematics?

Yes, mathematics recognizes different types of infinity, such as countable and uncountable infinities, which have different properties.

#### Why is infinity important in physics?

Infinity helps physicists describe concepts and phenomena that are unobservable and theoretically boundless, such as the universe.

#### Does infinity have a symbol in mathematics?

Yes, the symbol for infinity is ∞, used to denote endless processes or unbounded limits.

#### Is there a philosophical aspect to infinity?

Philosophically, infinity provokes discussions about the nature of the universe, existence, and the limits of knowledge.

#### What is an example of infinity in real life?

Real-life examples of infinity are less tangible but can include concepts like the endless number of points in a line segment.

#### How do children understand forever and infinity?

Children often perceive forever and infinity as very large, indefinite amounts, but they usually grasp forever easier as it relates more to their experiences.

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Written by

Tayyaba RehmanTayyaba Rehman is a distinguished writer, currently serving as a primary contributor to askdifference.com. As a researcher in semantics and etymology, Tayyaba's passion for the complexity of languages and their distinctions has found a perfect home on the platform. Tayyaba delves into the intricacies of language, distinguishing between commonly confused words and phrases, thereby providing clarity for readers worldwide.

Co-written by

Fiza RafiqueFiza Rafique is a skilled content writer at AskDifference.com, where she meticulously refines and enhances written pieces. Drawing from her vast editorial expertise, Fiza ensures clarity, accuracy, and precision in every article. Passionate about language, she continually seeks to elevate the quality of content for readers worldwide.