Read the dictionary definition of thumb. All definitions for this word.
1. a convex molding having a cross section in the form of a quarter of a circle or of an ellipse
2. the part of a glove that provides a covering for the thumb
3. the thick short innermost digit of the forelimb
4. feel or handle with the fingers
1. finger the binding of the book
5. travel by getting free rides from motorists
6. look through a book or other written material
1. He thumbed through the report
2. She leafed through the volume
