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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181. But he said in all seriousness that such fears were unwarranted.
182. Due to the seriousness of his condition, he was put in the intensive care unit.
183. Of course, the rich, hard-to-get-into schools would have to take the lead: Amherst, Yale, Stanford,(sentencedict .com) and such should set a new standard of seriousness about learning.
184. The natural scientist and the thinker first realized that the seriousness of the problem, they actively promoted environmental protection; John Muir is one of them.
185. European leaders have moved from an initial stance of denial about the seriousness of the region's debt problems through a series of sticking-plaster solutions as the rot spread.
186. This incident is surpasses the Sanlu milk scandal in its seriousness, viciousness and intentionally subjectiveness.
187. It makes sincerity turn to hypocrisy, cleverness turn to slyness and seriousness turn to dogma.
188. Your records are a litmus test of your seriousness as a trader.
189. It can be seen that, "no more seriousness" signs the attack of the vulgarization in the linked degree of the cultural value of modernity.
190. I looked carefully all around me. And I saw a most extraordinary small person, who stood there examining me with great seriousness.
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.