Définition "thumb" dans le dictionnaire Collins English Dictionary & Thesaurus

thumb n

1 the first and usually shortest and thickest of the digits of the hand, composed of two short bones, (Technical name) pollex Related adj → 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

9 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 thuma; related to Old Saxon thuma, Old High German thumo, Old Norse thumall thumb of a glove, Latin tumere to swell)
♦ thumbless adj
♦ thumblike adj