Share this entry


Synonyms of once in English:


  • 1 I saw him only once
    on one occasion, one time, one single time
    [Antonyms] twice, many times
  • 2 he did not once help
    ever, at any time, on any occasion, at all, under any circumstances, on any account, in a million years
  • 3 they were friends once
    formerly, previously, in the past, at one time, at one point, once upon a time, on a former occasion, on one occasion, one time, in one case, time was when, in days/times gone by, back in the day, in times past, in the (good) old days, long ago
    archaic sometime, erst, erstwhile, whilom
    literary in days/times of yore, of yore
    [Antonyms] now
  • Phrases

    at once
  • 1 you must leave at once
    immediately, right away, right now, this moment/instant/second/minute, now, straight away, instantly, instantaneously, directly, suddenly, abruptly, summarily, forthwith, promptly, without delay/hesitation, without further ado;
    quickly, as fast as possible, as soon as possible, fast, speedily, with all speed
    informal like a shot, in/like a flash, before you can say Jack Robinson, in two shakes (of a lamb's tail)
    [Antonyms] later, in due course
  • 2 all the guests arrived at once
    at the same time, at one and the same time, at the same instant/moment, (all) together, simultaneously;
    as a group, in unison, in concert, in chorus
    [Antonyms] singly, in dribs and drabs
  • conjunction

    Back to top  
  • he'll be all right once she's gone
    as soon as, when, after, immediately after, the instant/moment/second/minute
    British informal immediately
  • Phrases

    once and for all
  • 1 you must decide once and for all
    conclusively, decisively, finally, positively, absolutely, determinedly, definitely, definitively, irrevocably
  • 2 he has gone once and for all
    for good, for always, forever, permanently, finally, in perpetuity
    informal for keeps
  • once in a while
    once in a while a car went past
    rare interruptedly
    Share this entry

    What do you find interesting about this word or phrase?

    Comments that don't adhere to our Community Guidelines may be moderated or removed.