- An electric circuit connected so that current passes through each circuit element in turn without branching.串联电路：电流依次通过每一个电路元件而没有分支的连接成的电路
- closed book
- closed-captioned
- closed chain
- closed circuit
- closed corporation
- closed couplet
- closed-door
- closed-end
- closed-end investment company
- closed interval
- closed loop
- closed-minded
- closedown
- closedowns
- closed shop
- closed universe
- closed–captioned
- closed–door
- closed–end
- closed–minded
- close-fisted
- close-grained
- close-hauled
- close-knit
- close-knit