| Noun | 1. | thinness - relatively small dimension through an object as opposed to its length or width; "the tenuity of a hair"; "the thinness of a rope"dimension - the magnitude of something in a particular direction (especially length or width or height) thickness - the dimension through an object as opposed to its length or width | |
| 2. | thinness - the property of having little body fat | |
| 3. | thinness - the property of being very narrow or thin; "he marvelled at the fineness of her hair"narrowness - the property of being narrow; having little width | |
| 4. | thinness - a consistency of low viscosity; "he disliked the thinness of the soup"consistency, consistence, body - the property of holding together and retaining its shape; "when the dough has enough consistency it is ready to bake" wateriness - the property of resembling the viscosity of water | |