thumb Meaning and Definition

1. n. a convex molding having a cross section in the form of a quarter of a circle or of an ellipse

2. n. the part of a glove that provides a covering for the thumb

3. n. the thick short innermost digit of the forelimb

4. v. feel or handle with the fingers

5. v. travel by getting free rides from motorists

6. v. look through a book or other written material