Synonym: earnest, engrossed, grave, important, momentous, pensive, profound, reflective, sincere, solemn, thoughtful, weighty, zealous. Antonym: frivolous. Similar words: imperious, mysterious, curious, various, furious, notorious, nefarious, glorious. Meaning: ['sɪrɪəs /'sɪər-] 
adj. 1. concerned with work or important matters rather than play or trivialities 2. of great consequence 3. causing fear or anxiety by threatening great harm 4. appealing to the mind 5. completely lacking in playfulness 6. requiring effort or concentration; complex and not easy to answer or solve.
adj. 1. concerned with work or important matters rather than play or trivialities 2. of great consequence 3. causing fear or anxiety by threatening great harm 4. appealing to the mind 5. completely lacking in playfulness 6. requiring effort or concentration; complex and not easy to answer or solve. 
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31. Luckily, the damage was not serious.
32. He is a serious scholar, a genuinely learned man.
33. He would brook no serious dissent.
34. The strikes inflicted serious damage on the economy.
35. There were no reports of serious injuries.
36. Do you know it is a very serious offence to impersonate a police officer?
37. It was a strange conjunction — the prim serious young Queen and the elderly, cynical Whig.
38. A child is recovering in hospital after a serious attack by a stray dog.
39. The court case will do serious harm to my business.
40. It wasn't a serious heart attack, but it gave him a terrible scare.
41. Recent events seem less serious when put into an international perspective.
42. The doctor keeps a record of all the serious illnesses in the village.
43. Many serious illnesses can be nipped in the bud if they are detected early enough.
44. Are you serious or are you just trying to wind me up?
45. Revealing confidential information to a rival company could land you in serious trouble with your boss.
46. The only thing to do was knuckle down and get on with some serious hard work.
47. It's not yet clear whether the Prime Minister's resignation offer is a serious one, or whether it's simply a tactical move.
48. He suffered a serious injury that obliged him to give up work.
49. With competition from cheap imports, the British coal industry is facing a serious crisis.
50. The last decade has witnessed a serious rise in the levels of racism and hostility to Black and ethnic groups.
51. She was involved in a serious car accident last week.
52. We thought he was serious but in reality he was joking.
53. A number of serious accusations have been made against her.
53. Wish you will love sentencedict.com and make progress everyday!
54. The place was recently visited by a serious volcanic eruption.
55. If we continue to deplete the Earth's natural resources, we will cause serious damage to the environment.
56. She was taken to hospital with serious head injuries .
57. He contracted a serious illness and died a month later.
58. Three minutes into the match, Jackson limped off the pitch with a serious ankle injury.
59. The result of the vote poses a serious challenge to the government's credibility.
60. We were afraid he would be serious on stage, but in the event he performed beautifully.
More similar words: imperious, mysterious, curious, various, furious, notorious, nefarious, glorious, delirious, penurious, gregarious, notoriously, precarious, lugubrious, laboriously, glorious revolution, period, series, superior, inferior, ulterior, interior, exterior, a series of, deteriorate, riotous, pious, odious, perilous, envious.