Synonym: distressfulness, earnestness, serious-mindedness, sincerity. Similar words: cautiousness, consciousness, capriciousness, fastidiousness, pretentiousness, stream of consciousness, callousness, arduousness. Meaning: ['sɪrɪəsnɪs /'sɪər-] 
n. 1. an earnest and sincere feeling 2. the quality of arousing fear or distress 3. the trait of being serious.
n. 1. an earnest and sincere feeling 2. the quality of arousing fear or distress 3. the trait of being serious. 
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31. I don't think you've quite grasped the seriousness of the situation.
32. He told us in all seriousness that he was going to join a circus.
33. Only the chairman's strong control was able to impart some sense of seriousness to the meeting.
34. You don't seem to realize the seriousness of the situation.
35. You must recognize the seriousness of the problems we are facing.
36. His voice trailed off as the seriousness of his position sank in.
37. I don't think he has any notion of the seriousness of the situation.
38. As time went on,(Sentencedict.com)people came to be aware of the seriousness of China's population.
39. It would be a mistake to understate the seriousness of the problem.
40. Only the president's strong control was able to impart some sense of seriousness to the meeting.
41. The seriousness of the situation is difficult to appreciate in its totality .
42. I didn't realize the true seriousness of the country's problems until I went there myself.
43. Only later did he realize the full seriousness of his offence.
44. They will change their tune when they find out the seriousness of the problem.
45. While not wanting to underplay the seriousness of the situation, I have to say that it is not as bad as people seem to think.
46. The problem was not treated with the seriousness it deserved.
47. He spoke with a seriousness that was unusual in him.
48. The severity of the punishment should match the seriousness of the crime.
49. I need hardly remind you of the seriousness of the situation.
50. The Government has not yet grasped the seriousness of the crisis.
51. You can't in all seriousness go out in a hat like that!
52. In all seriousness now - joking aside - I do think there's a problem here that we've got to get sorted.
53. The ambassador's presence here signalizes the seriousness of the situation.
54. She put the figures up on the board to underline the seriousness of the situation.
55. We saw from the seriousness of her expression that she meant it.
56. The doctor, not wishing to make her nervous,(Sentencedict.com) did not fully explain the seriousness of her condition.
57. The sudden summoning of the Cabinet underlines the seriousness of the situation.
58. Surely you're not telling me, in all seriousness, that you want to work in a factory for the rest of your life!
59. She spoke with great seriousness of the hardships she had endured.
60. Grandma downplays the seriousness of her health problems.
More similar words: cautiousness, consciousness, capriciousness, fastidiousness, pretentiousness, stream of consciousness, callousness, arduousness, nervousness, righteousness, serious, meticulousness, imperious, imperiously, mysterious, deleterious, meritorious, mysteriously, carelessness, uselessness, tactlessness, selflessness, faithlessness, powerlessness, limitlessness, furious, various, curious, usurious, nefarious.