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something that is not known or cannot be understood; a mystery or puzzle:
Abstract art is a closed book as far as I’m concerned.
something deemed unknown or incapable of being understood
a matter that has been finally concluded and admits of no further consideration


Read Also:

  • Closed-box testing

    functional testing

  • Closed-caption

    noun See closed caption

  • Closed-captioned

    [klohzd-kap-shuh nd] /ˈkloʊzdˈkæp ʃənd/ adjective 1. (of a television program) broadcast with captions, as for the hearing-impaired, that are visible only with the use of a decoder attached to the television set. adjective 1. (of a video recording) having subtitles which appear on screen only if the cassette is played through a special decoder

  • Closed-captioning

    noun a system to display a transcription of the audio portion of a television program as it occurs, either verbatim or in edited form; also closed caption Examples When my husband is reading, I watch television with closed-captioning. Word Origin 1974

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