thumb

(noun) the thick short innermost digit of the forelimb. Synonyms: pollex.

(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. Synonyms: ovolo, quarter round.

(verb) travel by getting free rides from motorists. Synonyms: hitchhike, hitch.

(verb) look through a book or other written material. Synonyms: flick, flip, riffle, leaf, riff. Examples: "He thumbed through the report." "She leafed through the volume."

(verb) feel or handle with the fingers. Synonyms: finger. Examples: "Finger the binding of the book."