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Definition of serious adjective from the Oxford Advanced Learner's Dictionary

serious

adjective
 
/ˈsɪəriəs/
 
/ˈsɪriəs/
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    bad

  1. bad or dangerous
    • a serious illness/offence/crime
    • a serious problem/issue
    • to cause serious injury/damage/harm
    • They pose a serious threat to security.
    • The consequences could be serious.
    • A few years ago, the company was in serious trouble.
    • Their economies continue to face serious challenges.
    • She is in serious financial trouble.
    • She is now in a serious condition in Belfast Hospital.
    • serious for somebody/something This situation could be very serious for her.
    Extra Examples
    • By this time the riots were getting serious.
    • The crime is considered serious enough to warrant a jail term.
    • These are terribly serious allegations.
    • He admitted to having made a serious error of judgement.
    • He died after suffering from a serious illness.
    • The storm caused serious damage to farm buildings.
    • The country is now facing a serious political crisis.
    • The children were considered to be at serious risk of harm.
    • Your chances of having a serious accident at work can be quite high.
    Topics Health problemsa2, Crime and punishmenta2
    Oxford Collocations Dictionaryverbs
    • be
    • look
    • seem
    adverb
    • extremely
    • fairly
    • very
    preposition
    • for
    phrases
    • nothing serious
    • serious enough to warrant something
    See full entry
  2. not silly

  3. thinking about things in a careful and sensible way; not silly
    • Be serious for a moment; this is important.
    • I'm afraid I'm not a very serious person.
    Synonyms seriousseriousgrave earnest solemnThese words all describe somebody who thinks and behaves carefully and sensibly, but often without much joy or laughter.serious thinking about things in a careful and sensible way; not laughing about something:
    • He’s not really a very serious person.
    • Be serious for a moment; this is important.
    grave (rather formal) (of a person) serious in manner, as if something sad, important, or worrying has just happened:
    • He looked very grave as he entered the room.
    earnest serious and sincere:
    • The earnest young doctor answered all our questions.
    solemn looking or sounding very serious, without smiling; done or said in a very serious and sincere way:
    • Her expression grew solemn.
    • I made a solemn promise that I would return.
    Patterns
    • a(n) serious/​grave/​earnest/​solemn expression/​face
    • a serious/​solemn mood/​atmosphere
    Extra Examples
    • He became serious all of a sudden.
    • She was looking at him with a serious expression on her face.
    • Suddenly the conversation turned serious.
  4. not joking

  5. sincere about something; not joking or meant as a joke
    • Believe me, I'm deadly (= extremely) serious.
    • Don't laugh, it's a serious suggestion.
    • serious about doing something Is she serious about wanting to sell the house?
    • He knew it was time to get serious about losing weight.
    • serious about somebody/something He's really serious about Penny and wants to get engaged.
    • She doesn’t have a serious boyfriend.
    • (informal) You can't be serious! (= you must be joking)
    • You think I did it? Be serious! (= what you suggest is ridiculous)
    Extra Examples
    • Are you serious about resigning?
    • Joe is deadly serious in his beliefs.
    • Please try to stay serious!
    Oxford Collocations Dictionaryverbs
    • be
    • look
    • sound
    adverb
    • extremely
    • fairly
    • very
    preposition
    • about
    See full entry
  6. needing thought

  7. needing to be thought about carefully; not only for pleasure
    • a serious article
    • a serious newspaper
    • an appreciation of serious music
    • serious drama/fiction
    Extra Examples
    • Why do you waste your time reading that? It's hardly a serious newspaper, is it?
    • This book is the first serious study of the subject.
    • The speech was interesting, if a little serious for such a young audience.
    • It's time for a serious debate about the issue.
  8. important

  9. that must be treated as important
    • a serious matter
    • serious questions/concerns/doubts
    • serious allegations/charges
    • It's time to give serious consideration to this matter.
    • Please give it some serious thought before you make a decision.
    • The subject has received little serious attention.
    • We need to get down to the serious business of working out costs.
    • The team is a serious contender for the title this year.
  10. large amount

  11. (informal) used to emphasize that there is a large amount of something
    • You can earn serious money doing that.
    • I'm ready to do some serious eating (= I am very hungry).
  12. Word Originlate Middle English: from Old French serieux or late Latin seriosus, from Latin serius ‘earnest, serious’.
See serious in the Oxford Advanced American DictionarySee serious in the Oxford Learner's Dictionary of Academic English
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