The meaning of serious is thoughtful or subdued in appearance or manner : How to use serious in a sentence. See examples of serious used in a sentence.
Definition of serious adjective in oxford advanced american dictionary. Master the word "serious" in english: Serious can be used to describe something that is significant, grave or of significant importance.
Feb 6, 2026adjective serious (comparative more serious, superlative most serious) without humor or expression of happiness; Serious implies a concern with responsibility and work as.
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