Lewis \Lew"is\ (l[=u]"[i^]s), Lewisson \Lew"is*son\ (-s[u^]n), n. 1. An iron dovetailed tenon, made in sections, which can be fitted into a dovetail mortise; -- used in hoisting large stones, etc. [1913 Webster] 2. A kind of shears used in cropping woolen cloth. [1913 Webster] {Lewis hole}, a hole wider at the bottom than at the mouth, into which a lewis is fitted. --De Foe. [1913 Webster]