n. 1 moment, point, second, time I was thinking of you at the very instant the phone rang 2 moment, second, minute, flash, twinkling (of an eye), trice, Colloq jiffy I'll be with you in an instant, sir
adj. 3 instantaneous, immediate, on the spot, overnight His novel was an instant best seller 4 urgent, crying, pressing, earnest, imperative, critical, exigent; split-second, direct We have an instant need for a computer specialist 5 ready-made, ready-mixed, prepared, ready-to-serve, precooked This is an instant soup - just add hot water to the powder