| Main Entry: | |
| Part of Speech: | noun |
| Definition: | something not liquid or solid |
| Synonyms: | effluvium, fumes, miasma, smoke, stream, vapor, volatile substance |
| Notes: | fluids include liquids and gases; a liquid is a fluid with a fixed volume, and a gas is a fluid that can expand indefinitely |
| Antonyms: | liquid, solid |