Diameter vs. Dimension — What's the Difference?

In geometry, a diameter of a circle is any straight line segment that passes through the center of the circle and whose endpoints lie on the circle. It can also be defined as the longest chord of the circle.

In physics and mathematics, the dimension of a mathematical space (or object) is informally defined as the minimum number of coordinates needed to specify any point within it. Thus a line has a dimension of one (1D) because only one coordinate is needed to specify a point on it – for example, the point at 5 on a number line.

A straight line segment passing through the center of a figure, especially of a circle or sphere, and terminating at the periphery.

A measurable extent of a particular kind, such as length, breadth, depth, or height

The length of such a segment.

An aspect or feature of a situation

Thickness or width.

Cut or shape (something) to particular measurements.

A unit of magnification equal to the number of times an object's linear dimensions is increased by the magnifying apparatus.

A measure of spatial extent, especially width, height, or length.

(geometry) Any straight line between two points on the circumference of a circle that passes through the centre/center of the circle.

Often dimensions Extent or magnitude; scope

(geometry) The length of such a line.

Aspect; element

(geometry) The maximum distance between any two points in a metric space

The least number of independent coordinates required to specify uniquely the points in a space.

(graph theory) The maximum eccentricity over all vertices in a graph.

The range of such a coordinate.

Any right line passing through the center of a figure or body, as a circle, conic section, sphere, cube, etc., and terminated by the opposite boundaries; a straight line which bisects a system of parallel chords drawn in a curve.

(Physics) A physical property, such as mass, distance, time, or a combination thereof, regarded as a fundamental measure of a physical quantity

The length of a straight line through the center of an object from side to side; width; thickness; as, the diameter of a tree or rock.

A realm of existence, as in a work of fiction, that is physically separate from another such realm

The distance through the lower part of the shaft of a column, used as a standard measure for all parts of the order. See Module.

To cut or shape to specified dimensions.

The length of a straight line passing through the center of a circle and connecting two points on the circumference

To mark with specified dimensions.

A straight line connecting the center of a circle with two points on its perimeter (or the center of a sphere with two points on its surface)

A single aspect of a given thing.

A measure of spatial extent in a particular direction, such as height, width or breadth, or depth.

A construct whereby objects or individuals can be distinguished.

(geometry) The number of independent coordinates needed to specify uniquely the location of a point in a space; also, any of such independent coordinates.

(linear algebra) The number of elements of any basis of a vector space.

(physics) One of the physical properties that are regarded as fundamental measures of a physical quantity, such as mass, length and time.

(computing) Any of the independent ranges of indices in a multidimensional array.

A universe or plane of existence.

(transitive) To mark, cut or shape something to specified dimensions.

To specify the size of (an array or similar data structure); to allocate.

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Measure in a single line, as length, breadth, height, thickness, or circumference; extension; measurement; - usually, in the plural, measure in length and breadth, or in length, breadth, and thickness; extent; size; as, the dimensions of a room, or of a ship; the dimensions of a farm, of a kingdom.

Extent; reach; scope; importance; as, a project of large dimensions.

The degree of manifoldness of a quantity; as, time is quantity having one dimension; volume has three dimensions, relative to extension.

A literal factor, as numbered in characterizing a term. The term dimensions forms with the cardinal numbers a phrase equivalent to degree with the ordinal; thus, a2b2c is a term of five dimensions, or of the fifth degree.

The manifoldness with which the fundamental units of time, length, and mass are involved in determining the units of other physical quantities.

The magnitude of something in a particular direction (especially length or width or height)

A construct whereby objects or individuals can be distinguished;

One of three cartesian coordinates that determine a position in space

Magnitude or extent;

Indicate the dimensions on;

Shape or form to required dimensions