frequently_asked_questions_files/Oxford Thesaurus.pdf

15.11 once...
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once adv. 1 once upon a time, formerly, (at) one time, on a former
occasion, previously, before, in days gone by, in olden days, in
the (good) old days, long ago, some time ago, years or ages or
aeons ago, in days of yore: Your hair is as long as mine once
was. He was once a famous film star. That once revered leader
has fallen. 2 one time, on one occasion, a single time: He has
visited his family only once in all these years. 3 once and for
all. finally, positively, definitely, decidedly, conclusively,
for good: We must settle the itinerary once and for all before
we can make the bookings. 4 once in a while. occasionally,
(every) now and then, now and again, at times, sometimes,
periodically, from time to time, at intervals, sporadically: We
go to the theatre once in a while.
--conj. 5 (if) ever, as soon as, at any time: Once the bus
comes, you'd best get on it straight away.
--n. 6 at once. a immediately, straight away, right away,
directly, without delay, promptly, instantly, post-haste; in a
wink, in the twinkling of an eye, in a minute or moment or
second or split second, in no time (at all), before you can turn
around, before you can say 'Jack Robinson', in a trice, Colloq
in a jiffy, in two shakes of a lamb's tail: Watson, come here
at once. I'll be there at once. b together, at the same time,
simultaneously, at a stroke, in the same instant, in the same
breath, Colloq at one go, at a go, in one go: You cannot be in
two places at once.
oncoming adj. 1 advancing, arriving, coming, nearing, approaching,
onrushing, imminent: He swerved and just managed to avoid the
oncoming lorry.
--n. 2 onset, beginning, nearing, arrival, advance, approach:
With the oncoming of spring, the birds returned.
one adj. 1 single, lone, solitary, individual, sole, only: The one
time I kissed Margie it was heaven. 2 unified, united,
inseparable, joined, undivided, one and the same, identical,