|1.||Technical name: pollex the first and usually shortest and thickest of the digits of the hand, composed of two short bonesRelated: pollical|
|2.||the corresponding digit in other vertebrates|
|3.||the part of a glove shaped to fit the thumb|
|4.||architect another name for ovolo|
|5.||all thumbs clumsy|
|6.||thumbs down an indication of refusal, disapproval, or negation: he gave the thumbs down on our proposal|
|7.||thumbs up an indication of encouragement, approval, or acceptance|
|8.||under someone's thumb at someone's mercy or command|
|—vb (when intr, |
|9.||(tr) to touch, mark, or move with the thumb|
|10.||to attempt to obtain (a lift or ride) by signalling with the thumb|
|11.||to flip the pages of (a book, magazine, etc) perfunctorily in order to glance at the contents|
|12.||thumb one's nose at to deride or mock, esp by placing the thumb on the nose with fingers extended|
|[Old English thūma; related to Old Saxon thūma, Old High German thūmo, Old Norse thumall thumb of a glove, Latin tumēre to swell]|
The short thick digit of the human hand, next to the index finger and opposable to each of the other four digits.
thumbn. The slider on a window-system scrollbar. So called because moving it allows you to browse through the contents of a text window in a way analogous to thumbing through a book.