Definition of "thumb"
- noun
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.
The part of a slider that may be moved linearly along the slider.
A thumbnail picture.
- verb
To touch with the thumb.
To turn the pages of (a book) in order to read it cursorily.
To hitchhike.
- Sources