once in English

adverb

1

on one occasion or for one time only.

they deliver once a week

synonyms: on one occasion, one time, one single time

2

at some time in the past; formerly.

He had once been an Army officer

synonyms: formerly, previously, in the past, at one time, at one point, once upon a time, time was when, in days/times gone by, in times past, in the (good) old days, long ago, sometime, erstwhile, whilom, in days/times of yore, of yore

conjunction

1

as soon as; when.

once the grapes were pressed, the juice was put into barrels

synonyms: as soon as, when, after, the instant, the second, the minute, the moment

adverb

on one occasion, one time, one single time
ever, at any time, on any occasion, at all, under any circumstances, on any account
formerly, previously, in the past, at one time, at one point, once upon a time, time was when, in days/times gone by, in times past, in the (good) old days, long ago, sometime, erstwhile, whilom, in days/times of yore, of yore
at one time, formerly, erstwhile, erst
one time

conjunction

as soon as
as soon as, when, after, the instant, the second, the minute, the moment

Use "once" in a sentence

1. The DNA must replicate completely, once and only once.

2. Why is this once, only once in without you.

3. 9 The DNA must replicate completely, once and only once.

4. In thee at once; which thou at once wouldst lose.

5. I lived it twice now, once in anticipation, once in actuality.

6. Once you're pregnant.

7. German measles once.

8. The once predictable line of descent is Cloudier then it once was

9. Meyers was stabbed once in the abdomen and once in the neck.

10. Once, just once, the God Emperor had cried out to his majordomo: Moneo!

11. We also ran the analysis twice, once for men and once for women.

12. Not all at once.

13. We made out once.

14. Once is no rule.

15. Well, once is enough.

16. We once traveled inland.

17. Once it gets dark.

18. Once in a lullaby

19. Never once called permanence.

20. Corries still have to play Uwic twice and Barry Town once and Bettws once

21. 18 Why does it replicate just once, during the S phase, and only once?

22. So it would intersect the curve twice, once at this point, once at this point.

23. He was shot once in the arm and once in the chest at close range.

24. Synonyms for Biyearly include semesterly, once every semester, once per semester, biannually, semiannually and semiyearly

25. And all at once I knew, I knew at once I knew he needed me

26. Complimentary delousing once a month.

27. This was once barren wilderness.

28. Once, he caught me smoking.

29. Once someone called Jesus good.

30. Let him in at once.

31. Once bit [bitten] twice shy.

32. About once every thousand faces

33. And then... all at once. "

34. Once damaged, they cannot regenerate.

35. Once in range, open fire.

36. Once I met with Hong...

37. Have to laud you once!

38. The plunger retraced at once.

39. Coxcomb was once spelled cockscomb

40. Once downloaded, run the Applet

41. Hourly updates once he lands.

42. Everyone began talking at once.

43. Once I had a fortune.

44. Razorfish once had offices there.

45. Fetch a doctor at once.

46. Once cut, apples quickly discolour.

47. Let my final once fondle.

48. Once again, infinity is important.

49. So once the Khan Academy

50. A guy insulted me once.