1. • noun - the thick short innermost digit of the forelimb
   • noun - the part of a glove that provides a covering for the thumb
   • noun - a convex molding having a cross section in the form of a quarter of a circle or of an ellipse
   • verb - travel by getting free rides from motorists
   • verb - look through a book or other written material
   • verb - feel or handle with the fingers
2. • The short thick digit of the human hand, next to the index finger and opposable to each of the other four digits.
   • A corresponding digit in other animals, especially primates.
   • The part of a glove or mitten that covers the thumb.
   • An ovolo.
   • To scan (written matter) by turning over pages with or as if with the thumb.
   • To disarrange, soil, or wear by careless or frequent handling.
   • To solicit (a ride) from a passing vehicle by signaling with the thumb.
   • To scan written matter by turning over pages with or as if with the thumb: thumbed through the latest issue of the magazine.
   • To hitchhike.
3. • v - to leaf through with the thumb (the short, thick digit of the human hand)

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