Definition of closed in English:

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Pronunciation: /kləʊzd/


1Not open: rooms with closed doors lined the hallway he sat with his eyes closed
More example sentences
  • Kamat pushes open a closed door from her past and a memory slips out.
  • Allison pried open the closed elevator doors with a tool, and squeezed inside.
  • Letting out a sigh, Jenny went back over to the closed door and slowly opened it.
1.1(Of a society or system) not communicating with or influenced by others: the perception of the Soviet Union as a closed society had changed
More example sentences
  • The Institute was a closed society of the rich, famous and powerful.
  • The terrorists seek a closed society of fear and conformity.
  • It's almost impossible to gauge what they're doing because it is a closed society.
1.2Limited to certain people; not open or available to all: the UN Security Council met in closed session
More example sentences
  • However, she has agreed to appear before the commission on a second occasion, albeit in closed session.
  • Councillors were last night in closed session considering quotes from different firms for the general repair work.
  • This is not surprising because the world's elite closed tournaments are just that: closed.
1.3Unwilling to accept new ideas: you’re facing the situation with a closed mind
More example sentences
  • Darren sees all this carefully orchestrated chaos and confusion as a way to unlock closed minds.
  • And that's the beauty of using music as a Trojan Horse into closed minds.
  • And the opposite of faith is not so much doubt as fear, or the rocklike certainty of the closed mind.
2(Of a business) having ceased trading, especially for a short period: he put the ‘Closed’ sign up on the door
More example sentences
  • Up and down Brandon Boulevard on Sunday afternoon were nothing but closed businesses.
  • He declined to discuss target figures for sign-ups to the service because the company is currently in a closed period.
  • They want the closed factory reopened and the payment of salaries pending for the last 18 months.
3 Mathematics (Of a set) having the property that the result of a specified operation on any element of the set is itself a member of the set.
Example sentences
  • He proved that every field has an algebraically closed extension field, perhaps his most important single theorem.
  • What I'm thinking of is a closed, known set of items and these can take many forms.
3.1(Of a set) containing all its limit points.
Example sentences
  • Every uncountable closed set can be partitioned into a perfect set and a countable set.
  • He also defined closed subsets of the real line as subsets containing their first derived set.
3.2 Geometry (Of a curve or figure) formed from a single unbroken line.
Example sentences
  • Finally the fifth case consists of two symmetrically positioned closed curves.
  • The time line dips back into the past and could form a closed curve in spacetime.
  • A formula for the line integral of the geodesic curvature along a closed curve is known as the Gauss Bonnet theorem.



behind closed doors

Taking place secretly or without public knowledge: the legislature allows its business to be completed behind closed doors
More example sentences
  • He also gave expert evidence in many child protection cases which are held behind closed doors with no public scrutiny.
  • Our view is that those who run the media should run it in public, and not behind closed doors.
  • The committee made the decision behind closed doors - its meetings are not open to press or public.

closed book

A subject or person about which one knows nothing: accounting has always been a closed book to me
More example sentences
  • The political parties are closed books as far as the majority is concerned.
  • She explained: ‘I still think to this day that there is more to it than what came out but you are dealing with the army and it is a closed book.’
  • I don't like it, and though I don't consider myself a public person, there is no aspect of my life that is a closed book.

For editors and proofreaders

Line breaks: closed

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