demeanourde‧mea‧nour British English, demeanor American English /dɪˈmiːnə $ -ər/ noun [singular, uncountable] formal 
Word Origin
his quiet, reserved demeanour► see thesaurus at behaviour
Word OriginWORD ORIGINdemeanor
ExamplesOrigin:
1400-1500 demean ‘to behave’ (14-21 centuries), from Old French demener ‘to guide’EXAMPLES FROM OTHER DICTIONARIES
Thesaurus- When you mention Polly's ex-husband, her entire demeanour changes.
- He felt genuine awe at this superhuman man, at once so puissant, so self-possessed, so monomaniac in his demeanour.
- Her demeanour late on that Sunday evening was drowsy and detached.
- I must admit I was impressed by Robert's demeanour.
- It was galling to her to observe his change in demeanour.
- Physically attractive and possessed of considerable personal charm, his demeanour was self-effacing, gracious and polite.
- Picture his bleary expression, his fuzzy eyes, his baffled demeanour.
- This was done by uniform, demeanour, and voice.
- When he was with close friends, he abandoned that somewhat starched public demeanour.
THESAURUS► behaviour
the way someone behaves, dresses, speaks etc that shows what their character is like: British English, behavior American English the way someone behaves: · Chemicals added to food may be responsible for children’s bad behaviour.· Tatsuya apologized for his behaviour towards me.
► conduct formal the way someone behaves in public or in their job – used mainly in official or legal contexts: · Bates was arrested and charged with disorderly conduct (=noisy and violent).· The committee found him guilty of unsatisfactory professional conduct.
► manner the way someone behaves when they are talking to or dealing with other people, which is shown in their expression, their voice etc: · She had a pleasant friendly manner.· Suddenly his whole manner changed, and he started shouting.· His initial manner towards her had been rather formal.
► demeanour British English, demeanor American English formal the way someone looks and behaves, which shows you something about their character or feelings: · She maintained a calm demeanour at all times.· Wenger’s demeanour suggested that he was not happy with the situation.
► antics someone’s behaviour – used when you think it is silly, funny, strange, or annoying: · The drunken antics of some English football fans has brought shame on the country.· The actor is becoming known for his increasingly bizarre off-screen antics.
Longman Language Activatorthe way someone behaves► behaviour British /behavior American the way someone behaves: · His behaviour in school is beginning to improve.· That kind of behavior is not acceptable.behaviour towards: · Eric's behaviour towards his family surprised me.
► manner the way someone behaves when they are talking to or dealing with other people: · The driver's manner was very unfriendly.· She impressed everyone with her businesslike manner.
► conduct the way someone behaves in public, in their job etc, especially in matters where moral principles are involved - used especially in legal or official contexts: · A middle-aged banker has been fined £200 for violent conduct on a train.· The Medical Committee found the doctor guilty of unethical conduct towards three of his patients.code of conduct (=rules of professional behaviour): · A new code of conduct for civil servants will be issued next week.
► antics behaviour that some people think is stupid or not responsible but other people think is funny: · The Queen is said to disapprove of the antics of some of the younger members of the Royal Family.
► demeanour British /demeanor American the way someone looks and behaves, that gives you a general idea of their character: · He was a small round man with a cheerful demeanor.· When you mention Polly's ex-husband, her entire demeanour changes.
his quiet, reserved demeanour► see thesaurus at behaviour