(to make) a short, high-pitched signal (e.g. in a hospital to call a doctor)

indication; authorization

leather squares used to prevent a horse from seeing sideways

indication; authorization

a branch of physics dealing with matter in motion

movement, action

a movement of the hand or head to show feeling etc

motion as communication

(the manner of) moving

movement, action

the act of recognizing or being recognized

identification, acknowledgment

to lift (the shoulders) slightly (to show indifference, doubt etc)

gesture

a mark, object, symbol etc used to represent something: 'mathematical sings' such as '+', '-', 'x', '?'; a word or words, design etc on a board or plate to give a warning, or to give direction; to write (one's name) on (a letter, application form etc)

indication, evidence