closed

English

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Pronunciation

closed (not comparable)

1. Sealed, made inaccessible or impassable; not open.
3. Not public.
closed source  a closed committee  The bill is being considered by the committee in closed session.
4. (topology, of a set) Having an open complement.
5. (mathematics, of a set) Such that its image under the specified operation is contained in it.
The set of integers is closed under addition: ${\displaystyle \forall x,y\in \mathbb {Z} \,x+y\in \mathbb {Z} }$ .
6. (mathematics, logic, of a formula) Lacking a free variable.
7. (graph theory, of a walk) Whose first and last vertices are the same, forming a closed loop.
8. (phonology) Formed by closing the mouth and nose passages completely, like the consonants /t/, /d/, and /p/.
9. (phonology) Having the sound cut off sharply by a following consonant, like the /ɪ/ in pin.

Antonyms

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

Translations

The translations below need to be checked and inserted above into the appropriate translation tables, removing any numbers. Numbers do not necessarily match those in definitions. See instructions at Wiktionary:Entry layout § Translations.

Verb

closed

1. simple past tense and past participle of close

Welsh

Noun

closed m (plural closedau)

1. Alternative form of closet

Welsh mutation