Definition: 1. Something can only happen or be true in a particular situation. 2. Used to give the only situation in which something will not happen or be true.
Use 'unless' in a sentence:
1. Life on Earth will become unsustainable unless population growth is held in check.
2. Have a cup of tea—unless you'd prefer a cold drink?
3. The Chancellor could face a rough ride unless the plan works.
4. Unless I'm mistaken, she was back at work yesterday.
5. I won't tell them—not unless you say I can.
6. The targets would not be achieved unless other departments showed equal commitment.
7. The economy is in danger of collapse unless far-reaching reforms are implemented.
8. In the past, the UN has stayed out of the internal affairs of countries unless invited in.
9. You won't get paid for time off unless you have a doctor's note.
10. Unless you are trying to lose weight to please yourself, it's going to be tough to keep your motivation level high.
11. You are allowed 20kgs of baggage unless indicated otherwise on your ticket.
12. The mailboat arrived on Friday mornings unless bad weather intervened.
13. All bitches should be spayed unless being used for breeding.
14. Why did you need a room unless you were up to something?
15. Unless these questions are solved, the region will remain a powder keg.
16. The theatre faces closure unless it gets an urgent cash injection.
17. The president could face a rough ride unless the plan works.
18. I won't tell them ─ not unless you say I can.
19. Unless I'm very much mistaken, that's Paul's wife over there.
20. Her bank warned that unless she repaid the overdraft she could face legal action.
21. Unless he was equipped with a directional microphone, he was out of earshot.
22. Recovery can't be sustained unless more jobs are created.
23. We cannot understand disease unless we understand the person who has the disease.
24. Unless my eyes deceive me, that's his wife.
25. I will expect to see you on Sunday unless I hear anything to the contrary.
26. Unless she loses some weight, she's had it.
27. The government does not want to go to war unless all other alternatives have failed.
28. She refused to testify, unless the murder charge against her was dropped.
29. He hasn't got any hobbies—unless you call watching TV a hobby.
30. I'm not happy unless I ride or drive every day.
31. He hasn't got any hobbies ─ unless you call watching TV a hobby.
32. I tend to forget things unless I mark them down.
33. That's the plan—unless anything untoward happens.
34. That's the plan ─ unless anything untoward happens.
35. You're not going to get out of here unless we make a deal.
36. Training is worthless unless there is proof that it works.
37. The cultural life of the country will sink into atrophy unless more writers and artists emerge.
38. The country has been threatened with complete isolation from the international community unless the atrocities stop.
39. Unless something unexpected happens, I'll see you tomorrow.
40. Have a cup of tea ─ unless you'd prefer a cold drink?
41. I sleep with the window open unless it's really cold.
42. Unless we start making some sales, we're done for.
43. Their captors told them they would be killed unless they cooperated.
44. Such schemes mean little unless they impact on people.
45. The union cannot call a strike unless it holds a ballot of members.
46. They refused to release their hostages unless certain conditions were met.
47. Most dogs will not attack unless provoked.
48. No-one could use the computer unless they had a password.
