closed
adj.-
1 shut or sealed (adj.) A1 Beginnernot open, so that people or things cannot get through.
physically obstructed or sealed so as to prevent passage or access.
ExampleKeep the window closed so the rain doesn't come inside.
ExampleThe heavy oak doors remained closed throughout the ceremony to ensure the privacy of the participants.
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2 not in business (adj.) A2 Elementarynot open for business or not working at the moment.
not available for operation, public access, or commercial transactions.
ExampleThe bank is closed on Sundays, so you will have to wait until Monday.
ExampleThe museum was closed for renovations, much to the disappointment of the tourists who had travelled across the country to see the exhibit.
- shut
- out of service
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3 finished or settled (adj.) B2 Upper Intermediatecompleted or decided, with no more work or talk needed.
finalised or concluded; no longer subject to discussion or action.
ExampleThe police consider the case closed now that they have found the owner.
ExampleOnce the contract was signed, the chairman declared the matter closed and moved on to the next item on the agenda.
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4 mathematics/logic (adj.) C1 Advanced Technical Mathdescribing a group of numbers or a shape that has a clear boundary or limit.
describing a set where an operation always produces a result within that set, or a curve that returns to its starting point.
ExampleA circle is a closed curve because it has no beginning or end.
ExampleThe set of integers is closed under addition, meaning the sum of any two integers is always another integer.