thumb meaning and definition

THUMB noun

Definition of thumb (noun)

1. the thick short innermost digit of the forelimb
   • synonyms: pollex
2. the part of a glove that provides a covering for the thumb
3. a convex molding having a cross section in the form of a quarter of a circle or of an ellipse
   • synonyms: ovolo, quarter round

THUMB verb

Definition of thumb (verb)

1. travel by getting free rides from motorists
   • synonyms: hitch, hitchhike
2. look through a book or other written material
   • "He thumbed through the report"; "She leafed through the volume"
   • synonyms: flick, flip, leaf, riff, riffle
3. feel or handle with the fingers
   • "finger the binding of the book"
   • synonyms: finger