| n. | 1. | The quality or state of being thick (in any of the senses of the adjective). |
| Noun | 1. | thickness - the dimension through an object as opposed to its length or width Antonyms: slenderness, tenuity, thinness - relatively small dimension through an object as opposed to its length or width; "the tenuity of a hair"; "the thinness of a rope" |
| 2. | thickness - used of a line or mark Synonyms: heaviness | |
| 3. | thickness - resistance to flow Antonyms: thinness - a consistency of low viscosity; "he disliked the thinness of the soup" |