unknown
unknown Lexical Profile
unknown Game Scores & Validity
• adjective
Not known, recognized, or familiar; not yet discovered, identified, or understood.
"The exact cause of the ancient civilization's sudden collapse remains unknown to historians."
Having no public fame, reputation, or renown; obscure.
"The lead role was awarded to a relatively unknown actor from a small regional theater."
• noun
An unknown person, thing, place, or circumstance, especially something that has not yet been experienced or investigated.
"Early explorers required immense courage to sail into the vast unknown."
A symbol or quantity in a mathematical equation whose value is to be determined by solving the equation.
"To solve the system of linear equations, you must first isolate one of the unknowns."
• Rhymes for unknown
• Nearby Words
Word Origin & Etymology
Formed in Middle English from the prefix 'un-' (meaning 'not') and 'known', the past participle of the Old English verb 'cnawan' (to know, perceive, or recognize).