The meaning of UNKNOWN is not known. How to use unknown in a sentence.

Unknown is a 2011 action thriller film directed by Jaume Collet-Serra and starring Liam Neeson, Diane Kruger, January Jones, Aidan Quinn, Bruno Ganz, and Frank Langella. [7]

UNKNOWN definition: not known; not within the range of one's knowledge, experience, or understanding; strange; unfamiliar. See examples of unknown used in a sentence.

UNKNOWN meaning: 1. not known or familiar: 2. what is not familiar or known: 3. a person, especially a performer…. Learn more.

1. not known; not within the range of knowledge, experience, or understanding; strange; unfamiliar. 2. not discovered, explored, identified, or ascertained. 3. not widely known; not famous; obscure. n. 4. a …

If you say that a particular problem or situation is unknown, you mean that it never occurs. Heart disease was virtually unknown at the turn of the century.

Dec 14, 2025 · Noun unknown (plural unknowns) (algebra) A variable (usually x, y or z) whose value is to be found. Any thing, place, or situation about which nothing is known; an unknown fact or piece of …

If something is unknown, it's not familiar understood, like the unknown path through the woods you've never explored or your brother's unknown reasons for staying late after school.

(chiefly US) The big unknown [=the important thing that everyone would like to know] is how investors will react.

UNKNOWN definition: 1. not known or familiar: 2. what is not familiar or known: 3. a person, especially a performer….