Unknown ˌʌnˈnəʊn Adjective Previously Group Claimed Responsibility Bombing

• a previously unknown group claimed responsibility for the bombing.
• he was trying, for some unknown reason, to count the stars.
• the man's identity remains unknown.
• an unknown number of civilians were killed or injured in the attack.

unknown

1. not known or identified
• A previously unknown group claimed responsibility for the bombing.
• He was trying, for some unknown reason, to count the stars.
• The man's identity remains unknown.
• An unknown number of civilians were killed or injured in the attack.
• patients suffering from fevers of unknown origin
• a species of insect hitherto unknown to science

Extra Examples

• His whereabouts were quite unknown during this period.
• She departed for parts unknown (= nobody knew where she was going).
• These sites remain largely unknown to the British public.
2. not famous or well known
• She was then still relatively unknown.
• The author is virtually unknown outside Poland.
• a film with a largely unknown cast
• an unknown actor
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).
• It is virtually unknown for foxes to attack anyone.
• a period of democratic development unknown in their country until now
4. a person or thing whose qualities or abilities are not yet known
5. without the person mentioned being aware of it
• Unknown to me, he had already signed the agreement.