| Noun | 1. | thumb - the thick short innermost digit of the forelimbfinger - any of the terminal members of the hand (sometimes excepting the thumb); "her fingers were long and thin" | |
| 2. | thumb - the part of a glove that provides a covering for the thumbcovering - an artifact that covers something else (usually to protect or shelter or conceal it) | |
| 3. | thumb - a convex molding having a cross section in the form of a quarter of a circle or of an ellipseechinus - ovolo molding between the shaft and the abacus of a Doric column | |
| Verb | 1. | thumb - travel by getting free rides from motoristsride - be carried or travel on or in a vehicle; "I ride to work in a bus"; "He rides the subway downtown every day" | |
| 2. | thumb - look through a book or other written material; "He thumbed through the report"; "She leafed through the volume"peruse - examine or consider with attention and in detail; "Please peruse this report at your leisure" | |
| 3. | thumb - feel or handle with the fingers; "finger the binding of the book"touch - make physical contact with, come in contact with; "Touch the stone for good luck"; "She never touched her husband" | |