Thin'ness, n.

(109), n. 1. The state of being thin, in any of the senses of the word; smallness of extent from one side or surface to the opposite; tenuity; rareness; fluidity; as, the thinness of ice; the thinness of a plate; the thinness of air or other fluid. 2. A scattered state; paucity; as, the thinness of trees in a forest; the thinness of inhabitants.