1. thumb - Noun
2. thumb - Verb
The short, thick first digit of the human hand, differing from the other fingers in having but two phalanges; the pollex. See Pollex.
To handle awkwardly.
To play with the thumbs, or with the thumbs and fingers; as, to thumb over a tune.
To soil or wear with the thumb or the fingers; to soil, or wear out, by frequent handling; also, to cover with the thumb; as, to thumb the touch-hole of a cannon.
To play with the thumb or thumbs; to play clumsily; to thrum.
Source: Webster's dictionaryfinger the binding of the book Source: Internet
He thumbed through the report Source: Internet
She leafed through the volume Source: Internet
A bassist holding a French bow; note how the thumb rests on the shaft of the bow next to the frog. Source: Internet
According to different definitions, the thumb can be called a finger, or not. Source: Internet
A decent rule of thumb for FOI is that if the information has been paid for by taxpayers, then you should have a right to access it. Source: Internet