Within a short space of time; = quickly, adv. 2b. Obsolete or merged in sense 1.

A hasty, reckless, or wanton movement, a rush. literal and figurative. at one fling: at one movement or impulse. full fling: with haste or force…

at one (a) chop: at one stroke, at once, (French tout d'un coup).

In one bound, without intermediate steps; all at once.

at one (fell,etc.) swoop, at one sudden descent, as of a bird of prey; hence, at a single blow or stroke.

With (the action or sound of) a pop; instantaneously, abruptly; unexpectedly. Also figurative.

In an instant, in a moment; without any perceptible interval between beginning and completion.

Phrases. to cast one's garter: (Scottish) to secure a husband; in the catching up of a garter: in a moment; to fly the garter: see fly-the-garter, n.…

In figurative and allusive uses. in the drawing of a trigger, in a moment, instantaneously. quick on the trigger, quick to act in response to a…

Scottish. The brief space of time which it takes to clap the hands; an instant, a moment. Chiefly in in a handclap.

at a slap, all at once.

In a moment, instantaneously. Also: every moment, moment by moment.

in a whiff: in a short time, in a jiffy. dialect.

colloquial or slang. Used as the type of instantaneous action, esp. in the phrases in a shake, in a braceor couple of shakes. Also, in three (or two)…

The verb stem is used adverbially to express a sudden rapid motion; = ‘bolting, with one bolt, straight’.

at a single jet (also at one jet): with a single effort of the mind; in one go. Now rare.

figurative. As if in a single night; very quickly, suddenly, instantaneously.

in a jiffy.

in two twos: in a very short time; directly, immediately. slang or colloquial. Also in two ups (Australian colloquial) = shake, n.1