/θʌm/
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 or cover with the thumb.(with through) To turn the pages of (a book) in order to read it cursorily.(travel) To hitchhikeTo 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.