English Explanatory Dictionary

unknown unknown

English dictionary entry

Meanings

noun
  1. An uncertainty of unknown magnitude, consequence, structure, and probability characteristics, possibly with completely unsuspected existence; something that we don't know that we don't know.

Word forms

unknown unknown unknown unknowns

Etymology

Popularized by Donald Rumsfeld in 2002, though used much earlier.

Synonyms

unk-unk

Related words

known known known unknown unknown known a little knowledge is a dangerous thing
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