adjective

serious

serious, grave, solemn, earnest

This is a serious problem.

This is a serious problem.

He is a very serious person.

He is a very serious person.

Are you serious about moving to Spain?

Are you serious about moving to Spain?

serious + ((noun)) describing (sth.) as important or bad This is a serious problem.

to be serious ((about sth./doing sth.)) to be sincere about (sth.) Are you serious about leaving your job?

Synonyms: grave, solemn, earnest; Antonyms: funny, trivial, light-hearted

From Latin 'serius' meaning 'grave, weighty, important'.

Imagine a judge with a very 'serious' face. They are not joking around.

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