once

Từ điển Việt Anh Việt 4in1 - English Vietnamese 4 in 1 Dictionary

I.once¹ S1 W1 /wʌns/ BrE AmE adverb
[Date: 1200-1300; Origin: one]
1. on one occasion only:
I’ve only met her once.
Paul’s been to Wexford once before.
(just) the once British English spoken:
Mrs Peterson came in to see Ruth just the once.
2. once a week/once every three months etc one time every week etc, as a regular activity or event:
Staff meetings take place once a week.
They took separate holidays at least once every two years.
3. at some time in the past, but not now:
Sonya and Ida had once been close friends.
She and her husband had once owned a house like this.
once-great/proud etc
It was sad to see the once-great man looking so frail.
the once-mighty steel industry
4. in the past, at a time that is not stated:
I once ran 21 miles.
Marx once described religion as the ‘opium of the people’.
5. at once
a) immediately or without delay:
Now, go upstairs at once and clean your room!
When I saw him I recognized him at once.
b) together, at the same time:
I can’t do two things at once!
Don’t all talk at once.
REGISTER
In everyday English, when people mean 'immediately', they usually say right away or, in British English, straight away rather than at once:
▪ I recognized him right away.
6. once more/once again
a) again, after happening several times before:
I looked at myself in the mirror once more.
Once again she’s refusing to help.
b) used to say that a situation changes back to its previous state:
The crowds had all gone home and the street was quiet once more.
c) formal used before you repeat something that you said before:
Once again, it must be stressed that the pilot was not to blame.
7. all at once
a) if something happens all at once, it happens suddenly when you are not expecting it:
All at once there was a loud banging on the door.
b) together, at the same time:
A lot of practical details needed to be attended to all at once.
8. (every) once in a while sometimes, although not often:
I do get a little anxious once in a while.
I saw her in the shop every once in a while.
9. never once/not once used to emphasize that something has never happened:
I never once saw him get angry or upset.
Not once did they finish a job properly.
10. (just) for once used to say that something unusual happens, especially when you wish it would happen more often:
Be honest for once.
Just for once, let me make my own decision.
For once Colin was speechless.
11. once and for all
a) if you deal with something once and for all, you deal with it completely and finally:
Let’s settle this matter once and for all.
b) British English spoken used to emphasize your impatience when you ask or say something that you have asked or said many times before:
Once and for all, will you switch off that television!
12. once or twice a few times:
I wrote to him once or twice, but he didn’t answer.
13. (just) this once spoken used to emphasize that this is the only time you are allowing something, asking for something etc, and it will not happen again:
Go on, lend me the car, just this once.
I’ll make an exception this once.
14. once upon a time
a) spoken at a time in the past that you think was much better than now:
Once upon a time you used to be able to leave your front door unlocked.
b) a long time ago – used at the beginning of children’s stories
15. once in a blue moon informal very rarely:
It only happens like this once in a blue moon.
16. do something once too often to repeat a bad, stupid, or dangerous action with the result that you get punished or cause trouble for yourself:
He tried that trick once too often and in the end they caught him.
17. once a ..., always a ... spoken used to say that people stay the same and cannot change the way they behave and think:
Once a thief, always a thief.
18. once is/was enough spoken used to say that after you have done something one time you do not need or want to do it again
19. once bitten, twice shy used to say that people will not do something again if it has been a bad experience
II.once² S1 W1 BrE AmE conjunction
from the time when something happens:
Once I get him a job, he’ll be fine.
Once in bed, the children usually stay there.

oncehu

◎	[wʌns]
※	phó từ
	■	chỉ một dịp thôi, chỉ một lần
		☆	I've only been there once
			tôi chỉ đến đấy một lần mà thôi
		☆	he goes to church once a day/week/month
			mỗi ngày/tuần/tháng, ông ta đi lễ một lần
		☆	once every six months
			sáu tháng một lần
	■	trước kia, xưa kia, đã có một thời
		☆	I once talked with your teacher
			trước kia tôi đã có lần nói chuyện với thầy anh
		☆	he once worked for a Taiwanese company
			trước kia ông ta từng làm việc cho một công ty Đài Loan
		☆	this artist was once world-famous
			người nghệ sĩ này đã có một thời lừng danh khắp thế giới
	■	(trong câu hỏi hoặc câu phủ định) bao giờ, chút nào, dù chỉ một lần
		☆	he never once offered to help; he didn't once offer to help
			nó không hề đề nghị giúp đỡ dù chỉ một lần
		☆	did she once show any sympathy?
			đã có bao giờ cô ta tỏ ra thông cảm không?
	〆	once upon a time
		✓	ngày xửa ngày xưa
			☆	once upon a time there was a beautiful princess ...
				ngày xửa ngày xưa có một nàng công chúa xinh đẹp...
	〆	once more
	〆	once again
		✓	thêm một lần nữa
	〆	all at once
		✓	thình lình, đột nhiên
			☆	all at once the door opened
				thình lình cửa mở
			☆	all at once she lost her temper
				đột nhiên bà ta nổi nóng
	〆	at once
		✓	ngay lập tức, không chậm trễ
		✓	cùng một lúc, đồng thời
			☆	come here at once!
				lại đây ngay!
			☆	I can't do two things at once
				tôi không thể làm hai việc cùng một lúc được
			☆	this film is at once humorous and moving
				phim này vừa vui vừa cảm động
	〆	(just) for once
	〆	just this once
		✓	chỉ một lần này thôi
			☆	be pleasant to each other - just this once
				hãy vui vẻ với nhau, ir ra là một lần này
			☆	just for once he arrived on time
				chỉ có lần này nó đến đúng giờ
	〆	once or twice
		✓	một vài lần
	〆	I don't know the place well, I've only been there once or twice
		✓	Tôi không biết rõ chỗ ấy lắm, tôi chỉ đến đó một vài lần
	〆	once too often
		✓	quá nhiều lần
			☆	He had driven home drunk once too often - this time he got stopped by the police
				Quá nhiều lần nó say rượu lái xe về nhà - lần này thì nó bị cảnh sát giữ lại
	〆	once bitten, twice shy
		✓	(tục ngữ) phải một bận, cạch đến già
	〆	once and for all
		✓	một lần cho mãi mãi; dứt khoát
	〆	(every) once in a while
		✓	thỉnh thoảng, đôi khi
			☆	Once in a while we go to a restaurant - but usually we eat at home
				Thỉnh thoảng chúng tôi đi ăn nhà hàng - nhưng thường thì chúng tôi ăn ở nhà
	〆	once in a blue moon
		✓	năm thì mười hoạ (rất hiếm khi)
	〆	to get/give somebody/something the once-over
		✓	xem xét ai/cái gì qua loa
	〆	you are only young once
		✓	xem only
※	tính từ
	■	trước đây; đã từng là
		☆	my once master
			đã từng là ông chủ của tôi
※	liên từ
	■	khi mà, ngay khi, một khi
		☆	once you understand this principle, you will find no difficulty
			một khi anh hiểu được nguyên lý này, anh sẽ không thấy khó khăn gì nữa
※	danh từ
	■	(the once) một lần, một dịp duy nhất
		☆	the once is enough for me
			một lần là đủ đối với tôi
		☆	she's only done it the once, so don't be too angry
			cô ta chỉ làm việc này một lần thôi, nên xin ông đừng quá nóng giận

• Từ đồng nghĩa / Synonyms:
  formerly, at one time, erstwhile, erst, one time, in one case