serious

[ˈsɪriəs]

Definition:
1. Of great consequence.
2. Bad or dangerous.
3. Needing to be thought about carefully; not only for pleasure.
4. Requiring effort or concentration; complex and not easy to answer or solve.

Use 'serious' in a sentence:

1. It wasn't serious ─ it was all done in fun.
2. Don't be flippant, damn it! This is serious.
3. This decision will impose serious constraints on all schools.
4. The court case will do serious harm to my business.
5. Cars with serious faults have been called in by the manufacturers.
6. The weight loss began to look more serious.
7. A serious fall incapacitated the 68-year-old congressman.
8. Stop being facetious; this is serious.
9. He's really serious about Penny and wants to get engaged.
10. You really are serious about this, aren't you?
11. A lot of drivers have a serious attitude problem.
12. The symptoms can be uncomfortable, unpleasant and serious.
13. There were serious divisions within the party's own ranks.
14. She fancies herself (as) a serious actress.
15. It causes blindness or serious loss of vision.
16. The strike caused serious disruptions.
17. The level of inflation is a serious impediment to economic recovery.
18. The city's crime rate is a serious turn-off to potential investors.
19. The consequences could be serious.
20. The most serious cases were treated at the scene of the accident.
21. The United States is in a serious recession today.
22. He suffers from a serious heart condition.
23. As you rightly say, we have a serious problem.
24. Oh, please! You cannot be serious.
25. You're joking. Are you serious?
26. They pose a serious threat to security.
27. He makes the odd mistake ─ nothing too serious.
28. The government still face very serious difficulties.
29. Don't be flippant, damn it! This is serious!
30. He makes the odd mistake—nothing too serious.
31. Don't laugh, it's a serious suggestion.
32. I'm afraid I'm not a very serious person.
33. He's not really a very serious person.
34. He's quite a serious person.
35. Happily, his neck injuries were not serious.
36. Be serious for a moment; this is important.
37. They went into town to indulge in some serious shopping.
38. I regard this as a serious matter.
39. It wasn't serious—it was all done in fun.
40. Driving with excess alcohol in the blood is a serious offence.
41. I'm going to have to knuckle down to some serious study.
42. News of a serious road accident is just coming in.
43. His voice took on a more serious tone.
44. He suffered a serious injury that obliged him to give up work.
45. It's time to give serious consideration to this matter.
46. It was a question which deserved serious consideration.
47. We've had one or two problems ─ nothing serious.
48. I have serious reservations about his ability to do the job.
49. There is mounting evidence of serious effects on people's health.
50. The President's health was giving serious cause for concern.
51. This could cause serious damage to the country's economy.
52. Smoking is a serious danger to health.
53. Growing levels of pollution represent a serious health hazard to the local population.