thumb

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.

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To touch or cover with the thumb.

“to thumb the touch-hole of a cannon”

(with through) To turn the pages of (a book) in order to read it cursorily.

“I thumbed through the book and decided not to bother reading it all.”

(travel) To hitchhike

“So I started thumbin' back east, toward my hometown.”

To soil or wear with the thumb or the fingers; to soil, or wear out, by frequent handling.

To manipulate (an object) with the thumb; especially, to pull back the hammer or open the cylinder of a revolver.

To fire (a single action revolver) quickly by pulling the hammer while keeping the trigger depressed.