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Từ điển Oxford Advanced Learner 8th
unknown
un·known [unknown unknowns] adjective, noun BrE [ˌʌnˈnəʊn] NAmE [ˌʌnˈnoʊn]
adjective
1. ~ (to sb) not known or identified
•a species of insect previously unknown to science
• He was trying, for some unknown reason, to count the stars.
• The man's identity remains unknown.
2. (of people)not famous or well known
•an unknown actor
• The author is virtually unknown outside Poland.
3. never happening or existing
• The disease is as yet unknown in Europe (= there have been no cases there).
• It was not unknown for people to have to wait several hours (= it happened sometimes).
Example Bank:
•He cites the works of two otherwise unknown authors, the originals of these works having been lost.
•His whereabouts were quite unknown during this period.
•She departed for parts unknown.
•She was then still comparatively unknown.
•These sites remain largely unknown to the British public.
•This drug was practically unknown in Britain.
•a comparatively unknown actor
•a period of democratic development previously unknown in their country
•He was trying, for some unknown reason, to count the stars.
•The man's identity remains unknown.
Idioms: ↑unknown quantity ▪ ↑unknown to somebody
noun
1. the unknownsingular places or things that are not known about
•a journey into the unknown
•a fear of the unknown
2. countable a person who is not well known
•A young unknown played the leading role.
3. countable a fact or an influence that is not known
•There are so many unknowns in the proposal.
4. countable (mathematics)a quantity that does not have a known value
•X and Y in the equation are both unknowns.
Example Bank:
•Motherhood was for her a journey into the unknown.
•The championship was won by a complete unknown.
•This action represents a leap into the unknown.
•What the weather will be like on the day is, as always, the great unknown.
•a cast of virtual unknowns
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