,| 1. | the short, thick, inner digit of the human hand, next to the forefinger. |
| 2. | the corresponding digit in other animals; pollex. |
| 3. | the part of a glove or mitten for containing this digit. |
| 4. | Architecture. an ovolo or echinus molding. |
| 5. | to soil or wear with the thumbs in handling, as the pages of a book. |
| 6. | to glance through (the pages of a book, leaflet, etc.) quickly. |
| 7. | to play (a guitar or other instrument) with or as with the thumbs. |
| 8. | (of a hitchhiker) to solicit or get (a ride) by pointing the thumb in the desired direction of travel. |
| 9. | all thumbs, awkward; clumsy; bungling: The visitor almost knocked over a vase and seemed to be all thumbs. |
| 10. | thumb one's nose,
|
| 11. | thumbs down, a gesture or expression of dissent or disapproval: We turned thumbs down to that suggestion. |
| 12. | thumbs up, a gesture or expression of assent or approval. |
| 13. | under one's thumb, under the power or influence of; subordinate to. Also, under the thumb of. |

thumb (thŭm)
n.
The short thick digit of the human hand, next to the index finger and opposable to each of the other four digits.