all at once as a adverb: - 1
- 2
all at once
adverb
1 all at once
All at the same time:
— Let's say `Yes!' all at once.
synonym: all together.
Roget 113:
instantaneously
etc.
adj.;
in no time,
in less than no time;
presto,
subito†,
instanter,
suddenly,
at a stroke,
like a shot;
in a moment
etc.
n..
in the blink of an eye,
in the twinkling of an eye,
in a trice;
in one's tracks;
right away;
toute a l'heure [Fr.];
at one jump,
in the same breath,
per saltum [Lat.],
uno saltu [Lat.];
at once,
all at once;
plump,
slap;
at one fell swoop;"
at the same instant
etc.
n.;
immediately
etc.
(early)
132;
extempore,
on the moment,
on the spot,
on the spur of the moment;
no sooner said than done;
just then;
slap-dash
etc.
(haste)
684.
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Roget 684:
with haste,
with all haste,
with breathless speed;
in haste
etc.
adj.;
apace
etc.
(swiftly)
274;
amain†;
all at once
etc.
(instantaneously)
113;
at short notice
&c.;
immediately
etc.
(early)
132;
posthaste;
by cable,
by express,
by telegraph,
by forced marches.
hastily,
precipitately
etc.
adj.;
helter-skelter,
hurry-skurry†,
holus-bolus;
slapdash,
slap-bang;
full-tilt,
full drive;
heels over head,
head and shoulders,
headlong,
a corps perdu [Fr.].
by fits and starts,
by spurts;
hop skip and jump.
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2 all at once
Without warning:
— All at once, he started shouting.
synonym: all of a sudden.
Moby thesaurus: abruptly, all together, at a blow, at a stroke, at once, at one blow, at one jump, at one stroke, at one swoop, at one time, bang, collectively, communally, conjointly, corporately, dash, en masse, ensemble, forthwith, hastily, impetuously, impulsively, in a body, in a hurry, in association, in company, in conjunction, jointly, like a flash, like a thunderbolt, mutually, now, of a sudden, on short notice, per saltum, plop, plump, plunk, pop, precipitantly, precipitately, precipitously, pronto, right away, right now, right off, sharp, simultaneously, slap, smack, startlingly, straightaway, straightway, subito, sudden, suddenly, surprisingly, then and there, this minute, this very minute, together, unawares, unexpectedly, unitedly, uno saltu, without delay, without notice, without warning ... show more.
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