Thumb(v. t.)
- To play with the thumbs, or with the thumbs and fingers; as, to thumb over a tune.
Thumb(v. t.)
- 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.
Thumb(v. i.)
- To play with the thumb or thumbs; to play clumsily; to thrum.