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closed (not comparable)

  1. Sealed, made inaccessible or impassable; not open.
    A closed and locked door prevented my escape.
    • 2005, Pamela J. Carter, Susan Lewsen, Lippincott's Textbook for Nursing Assistants, page 277:
      When the top sheet, blanket, and bedspread of a closed bed are turned back, or fanfolded, the closed bed becomes an open bed, or a bed ready to receive a patient or resident.
  2. (engineering, gas and liquid flow, of valve or damper) To be in a position preventing fluid from flowing.
  3. (electricity, of a switch or circuit breaker) To be in a position allowing electricity to flow.
  4. (of a store or business) Not operating or conducting trade.
  5. Not public.
    closed source  a closed committee  The bill is being considered by the committee in closed session.
  6. (topology, of a set) Having an open complement.
  7. (mathematics, of a set) Such that its image under the specified operation is contained in it.
    The set of integers is closed under addition: .
  8. (mathematics, logic, of a formula) Lacking a free variable.
  9. (graph theory, of a walk) Whose first and last vertices are the same, forming a closed loop.
  10. (phonology) Formed by closing the mouth and nose passages completely, like the consonants /t/, /d/, and /p/.
  11. (phonology) Having the sound cut off sharply by a following consonant, like the /ɪ/ in pin.
  12. (of a multi-word compound) Having component words joined together without spaces or hyphens; for example, timeslot as opposed to time slot or time-slot.



  • (also phonetics (of vowels, syllables)): open

Derived terms[edit]


The translations below need to be checked and inserted above into the appropriate translation tables. See instructions at Wiktionary:Entry layout § Translations.

See also[edit]



  1. simple past and past participle of close





closed m (plural closedau)

  1. Alternative form of closet


Welsh mutation
radical soft nasal aspirate
closed glosed nghlosed chlosed
Note: Some of these forms may be hypothetical. Not every possible mutated form of every word actually occurs.