unsub

noun
un·​sub | \ ˈən-ˌsəb How to pronounce unsub (audio) \
plural unsubs

Definition of unsub

US law enforcement, informal
: the unknown perpetrator of a crime Not one but two murderous unsubs are on the loose in tonight's Criminal MindsTV Guide Rhyme remembered the thousands of times he'd run crime scenes. Sometimes a miracle would happen. He'd be looking around and somehow ideas about the unsub would come to him. He couldn't explain how.— Jeffery Deaver

First Known Use of unsub

1965, in the meaning defined above

History and Etymology for unsub

unknown (or unidentified) subject

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Last Updated

17 Sep 2019

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Time Traveler for unsub

The first known use of unsub was in 1965

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