ENGAGED

(IN USE) [adjective] [after verb; not gradable] - (of a telephone or a public toilet) already in use by someone elseEvery time I try and ring her, she/the phone/the number is engaged (US usually busy).(UK) I've been trying to call him all evening, but I keep getting the engaged tone/(ANZ) engaged signal (US busy signal) (= the sound you hear when you try to telephone someone but their telephone is in use).The sign on the toilet door at the back of the aircraft said 'Engaged' (= being used) all the way from New York to London. Compare vacant (EMPTY).See also engaged at engage in.