The quickness of action or occurrence.

synonyms: immediacy, immediateness, instancy.

Roget 113: instantaneity, instantaneousness, immediacy; suddenness, abruptness.    moment, instant, second, minute; twinkling, trice, flash, breath, crack, jiffy, coup, burst, flash of lightning, stroke of time.    epoch, time; time of day, time of night; hour, minute; very minute &c., very time, very hour; present time, right time, true time, exact correct time.    ... show more