solid

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).

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

A favor.

“I owe him; he did me a solid last year.”

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

“I prefer solids over paisleys.”

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

“The doctor said I can't eat any solids four hours before the operation.”

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

“Almost all metals are solid at room temperature.”

Large in size, quantity, or value.

Lacking holes, hollows or admixtures of other materials.

“solid chocolate”

Strong or unyielding.

“a solid foundation”

Excellent, of high quality, or reliable.

“I don't think Dave would have done that. He's a solid dude.”

Hearty; filling.

“a solid meal”

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

Financially well off; wealthy.

Sound; not weak.

“a solid constitution of body”

Written as one word, without spaces or hyphens.

“American English writes many words as solid that British English hyphenates.”

Not having the lines separated by leads; not open.

United; without division; unanimous.

“The delegation is solid for a candidate.”

Of a single color throughout.

“He wore a solid shirt with floral pants.”

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

“The solid lines show roads, and the dotted lines footpaths.”

Having all the geometrical dimensions; cubic.

“A solid foot contains 1,728 solid inches.”

Solidly.

Without spaces or hyphens.

“Many long-established compounds are set solid.”