serious, grave, solemn, sedate, staid, sober, earnest mean not light or frivolous. serious implies a concern for what really matters.

Please don't laugh - I'm being serious. He was wearing a very serious expression and I knew something was wrong. On the surface it's a very funny novel but it does have a more serious underlying theme.

SERIOUS definition: of, showing, or characterized by deep thought. See examples of serious used in a sentence.

Find 173 different ways to say SERIOUS, along with antonyms, related words, and example sentences at Thesaurus.com.

Define serious. serious synonyms, serious pronunciation, serious translation, English dictionary definition of serious. adj. 1. Thoughtful, somber, or grave in manner: He became serious when he …

If someone is serious about something, they are sincere about what they are saying, doing, or intending to do.

Definition of serious adjective in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

Any important situation is serious, and this word is also the opposite of humorous and playful.

Browse the complete thesaurus entry for Serious, including synonyms and antonyms, and related words.

SERIOUS meaning: 1 : having an important or dangerous possible result; 2 : involving or deserving a lot of thought, attention, or work