Solid vs. Valid — What's the Difference?

Solid is one of the four fundamental states of matter (the others being liquid, gas and plasma). The molecules in a solid are closely packed together and contain the least amount of kinetic energy.

Well grounded; just

Of definite shape and volume; not liquid or gaseous

Producing the desired results; efficacious

(Mathematics) Of or relating to three-dimensional geometric figures or bodies.

Having legal force; effective or binding

Firm or compact in substance

Containing premises from which the conclusion may logically be derived

Not hollowed out

Correctly inferred or deduced from a premise

Being the same substance or color throughout

(Archaic) Of sound health; robust.

Having no gaps or breaks; continuous

Well grounded or justifiable, pertinent.

Acting together; unanimous

Acceptable, proper or correct; in accordance with the rules.

Written without a hyphen or space. For example, the word software is a solid compound.

Related to the current topic, or presented within context, relevant.

(Printing) Having no leads between the lines.

(logic) Of a formula or system: such that it evaluates to true regardless of the input values.

Of good quality

(logic) Of an argument: whose conclusion is always true whenever its premises are true.

Substantial; hearty

Genuine - as distinguished from efficient or regular - sacrament.

Sound; reliable

Strong; powerful; efficient.

Financially sound

Having sufficient strength or force; founded in truth; capable of being justified, defended, or supported; not weak or defective; sound; good; efficacious; as, a valid argument; a valid objection.

Upstanding or dependable

Having legal strength or force; executed with the proper formalities; incapable of being rightfully overthrown or set aside; as, a valid deed; a valid covenant; a valid instrument of any kind; a valid claim or title; a valid marriage.

(Slang) Excellent; first-rate.

Well grounded in logic or truth or having legal force;

A substance having a definite shape and volume; one that is neither liquid nor gaseous.

Still legally acceptable;

(Mathematics) A geometric figure having three dimensions.

Without a break or opening; completely or continuously

As a whole; unanimously

(of an object or substance) That can be picked up or held, having a texture, and usually firm. Unlike a liquid, gas or plasma.

Large in size, quantity, or value.

Lacking holes, hollows or admixtures of other materials.

Strong or unyielding.

(slang) Excellent, of high quality, or reliable.

Hearty; filling.

Worthy of credit, trust, or esteem; substantial; not frivolous or fallacious.

Financially well off; wealthy.

Sound; not weak.

(typography) Written as one word, without spaces or hyphens.

Not having the lines separated by leads; not open.

United; without division; unanimous.

Of a single color throughout.

(of drawn lines) Continuous; unbroken; not dotted or dashed.

(dated) Having all the geometrical dimensions; cubic.

(of volumes of materials) Measured as a single solid, as the volumes of individual pieces added together without any gaps.

(chemistry) A substance in the fundamental state of matter that retains its size and shape without need of a container (as opposed to a liquid or gas).

(geometry) A three-dimensional figure (as opposed to a surface, an area, or a curve).

(informal) A favor.

An article of clothing which is of a single color throughout.

(in the plural) Food which is not liquid-based.

Solidly.

Without spaces or hyphens.

Having the constituent parts so compact, or so firmly adhering, as to resist the impression or penetration of other bodies; having a fixed form; hard; firm; compact; - opposed to fluid and liquid or to plastic, like clay, or to incompact, like sand.

Not hollow; full of matter; as, a solid globe or cone, as distinguished from a hollow one; not spongy; dense; hence, sometimes, heavy.

Having all the geometrical dimensions; cubic; as, a solid foot contains 1,728 solid inches.

Firm; compact; strong; stable; unyielding; as, a solid pier; a solid pile; a solid wall.

Applied to a compound word whose parts are closely united and form an unbroken word; - opposed to hyphened.

Fig.: Worthy of credit, trust, or esteem; substantial, as opposed to frivolous or fallacious; weighty; firm; strong; valid; just; genuine.

Sound; not weakly; as, a solid constitution of body.

Of a fleshy, uniform, undivided substance, as a bulb or root; not spongy or hollow within, as a stem.

Impenetrable; resisting or excluding any other material particle or atom from any given portion of space; - applied to the supposed ultimate particles of matter.

Not having the lines separated by leads; not open.

United; without division; unanimous; as, the delegation is solid for a candidate.

A substance that is held in a fixed form by cohesion among its particles; a substance not fluid.

A magnitude which has length, breadth, and thickness; a part of space bounded on all sides.

A substance that is solid at room temperature and pressure

The state in which a substance has no tendency to flow under moderate stress; resists forces (such as compression) that tend to deform it; and retains a definite size and shape

A three-dimensional shape

Of definite shape and volume; firm; neither liquid nor gaseous;

Of good substantial quality;

Entirely of one substance with no holes inside;

Of one substance or character throughout;

Uninterrupted in space; having no gaps or breaks;

Providing abundant nourishment;

Of good quality and condition; solidly built;

Having high moral qualities;

Not soft or yielding to pressure;

Having three dimensions;

Incapable of being seen through;

Entirely of a single color throughout;

Acting together as a single undiversified whole;