adj.

1. Occurring or completed without perceptible delay: Relief was instantaneous.
2. Done or made as quickly or directly as possible: an instantaneous reply to my letter.
3. Present or occurring at a specific instant: instantaneous velocity; instantaneous pressure.

[From Medieval Latin īnstantāneus, from Latin īnstāns, īnstant-, present. See instant.]

instantaneity in·stan'ta·ne'i·ty (ĭn-stăn'tə-nē'ĭ-tē, ĭn'stən-) n.
instantaneously in'stan·ta'ne·ous·ly adv.
instantaneousness in'stan·ta'ne·ous·ness n.

adjective

Occurring at once: immediate, instant. See time.

adj

Definition: immediate
Antonyms: delayed, eventual, late, later, long-term

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IN BRIEF: Done without perceptible lapse of time.

The arts are not just instantaneous pleasure—if you don’t like it, the artist is wrong. I belong to the generation which says if you don’t like it, you don’t understand and you ought to find out. — John Drummond (b. 1934), British writer, broadcaster.

Dansk (Danish)
adj. - øjeblikkelig, momentan, umiddelbar

Nederlands (Dutch)
onmiddellijk, bliksemsnel

Français (French)
adj. - immédiat, instantané

Deutsch (German)
adj. - unmittelbar

Ελληνική (Greek)
adj. - στιγμιαίος, στη στιγμή, ακαριαίος

Italiano (Italian)
istantaneo

Português (Portuguese)
adj. - instantâneo

Русский (Russian)
мгновенный

Español (Spanish)
adj. - instantáneo

Svenska (Swedish)
adj. - ögonblicklig, momentan (isht tekn.)

中文（简体） (Chinese (Simplified))
即时的, 同时发生的, 瞬间的

中文（繁體） (Chinese (Traditional))
adj. - 即時的, 同時發生的, 瞬間的

한국어 (Korean)
adj. - 즉시의, 순간의, 동시에 일어나는

日本語 (Japanese)
adj. - 即座の, 即時の

العربيه (Arabic)
‏(صفه) فوري, لحظي‏

עברית (Hebrew)
adj. - ‮מידי, נעשה/קורה כהרף-עין, קיים ברגע מסוים (פיסיקה)‬

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