| thumb |  | |
| 1. n. The short thick digit of the hand that for humans has the most mobility and can be made to oppose (moved to touch) all of the other fingers. | |
| 2. n. (computing) The part of a slider that may be moved linearly along the slider. | |
| 3. n. (colloquial, Internet) A thumbnail picture. | |
| 4. v. To touch or cover with the thumb. | |
| to thumb the touch-hole of a cannon | |
| 5. v. (transitive, with through) To turn the pages of (a book) in order to read it cursorily. | |
| I thumbed through the book and decided not to bother reading it all. | |
| 6. v. (travel) To hitchhike | |
| So I started thumbin' back east, toward my hometown. | |
| 7. v. To soil or wear with the thumb or the fingers; to soil, or wear out, by frequent handling. | |
| 8. v. To manipulate (an object) with the thumb; especially, to pull back the hammer or open the cylinder of a revolver. | |
| 9. v. To fire (a single action revolver) quickly by pulling the hammer while keeping the trigger depressed. | |
