solids

noun

1. 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).

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

3. A favor.

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

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

   I prefer solids over paisleys.

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

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