instantaneous

instantaneous

adjective

Definition of INSTANTANEOUS

done or occurring without any noticeable lapse in time <the thunder following the flash of lightning was nearly instantaneous>

Synonyms immediate, instant, split-second, straightaway

Related Words summary; fast, hit-and-run, prompt, quick, rapid, speedy, swift

Near Antonyms dilatory, tardy; slow, sluggish; prolonged, protracted; deferred, delayed