Sudden, unexpected.

Quick, nimble, prompt; eager, keen, bold; fierce, pugnacious.

Coming on, happening, or performed without delay; prompt, speedy.

Of an action, movement, etc.: quickly or deftly executed; fast, rapid; (of pace) briskly maintained.

Performed or taking place without delay; speedy; prompt, immediate. Obsolete except of death.

Not delayed or deferred; unretarded; immediate.

quick, immediate (cf. B. 2 above).

Quick, speedy, immediate. Obsolete.

Used or happening without delay; immediate, instant; (in quot. 1631) needed immediately, urgent, pressing. Cf. sense A. 5. Obsolete.

Not delayed or put off; immediate.

In adverbial phrases formed with prepositions. = suddenly, adv. (chiefly in sense A. 1). onor upon a (or the) sudden (also †on sudden, o' the sudden…

Occurring, accomplished, or taking effect without delay or lapse of time; done at once; instant.

Following immediately. Succeeding or coming without any interval; immediate.

Occurring in a moment, instantaneous. Obsolete.

Esp. of change or movement: occurring suddenly, unexpectedly, or without warning; sharp; precipitate, hasty. In later use also: characterized by…

Originally: †ready, at hand, immediate (obsolete). Now: of the nature of a magical transformation; rapid, quick, instantaneous.

That does not involve (unnecessary) formality or delay; characterized by a lack of hesitation or deliberation; hasty. Cf. summarily, adv. 3.

Instant, immediate. Obsolete.

A camera for taking instantaneous (short exposure) photographs, esp. of moving objects; a photograph taken by such a camera. Also figurative (usually…

Arriving or coming about quickly or in a short period of time; immediate, prompt.