unknown

Từ điển tiếng Anh - Cambridge Advanced Learners Dictionary

unknown UK [ʌnˈnəʊn] US [-ˈnoʊn] adjective
<I > not known or familiar
• The exact number of people carrying the virus is unknown.
• As recently as six months ago her name was almost unknown in Britain.
• Unknown to me, she'd organized a party for my birthday.
Thesaurus⁺: ↑Unknown and unfamiliar
 
• An unknown terrorist group has claimed responsibility for this morning's bomb attack.
• A generation ago, home computers were virtually unknown.
• The article is of unknown authorship.
• The director took a calculated risk in giving the film's main role to an unknown actor.
• The very concept of free speech is unknown to them.
 
noun
1. only singular what is not familiar or known
• Racism is in some ways just a fear of the unknown.
Thesaurus⁺: ↑Unknown and unfamiliar
2. countable a person, especially a performer or sports player, who is not famous
• For her latest film she deliberately chose a cast of unknowns.
Thesaurus⁺: ↑People of little importance
3. countable mainly US something that cannot be guessed at or calculated because so little is known about it
• It's the big unknowns that make insurance companies uneasy.
Thesaurus⁺: ↑Unknown and unfamiliar

• Từ đồng nghĩa / Synonyms:
  strange, obscure, unsung, nameless, unidentified, unnamed, unknown quantity, stranger, alien, unknown region, terra incognita
• Từ trái nghĩa / Antonyms:
  known, acquaintance, friend