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Dictionary definition for: Thumb
1. (n) the thick short innermost digit of the forelimb
2. (v) travel by getting free rides from motorists
3. (n) the part of a glove that provides a covering for the thumb
4. (v) look through a book or other written material; "He thumbed through the report" "She leafed through the volume"
5. (n) a convex molding having a cross section in the form of a quarter of a circle or of an ellipse
6. (v) feel or handle with the fingers; "finger the binding of the book"
WordNet 2.1 Copyright Princeton University. All rights reserved.