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English definition of “second”

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second

adjective, adverb, noun [C]  /ˈsek·ənd/ us  

second adjective, adverb, noun [C] (POSITION)

(a person or thing) coming immediately after the first: He missed only 2 of 11 shots in the second half. [C] Rent is due the second of every month.
secondly
adverb [not gradable]  /ˈsek·ənd·li/ ( also second) us  
First, what does it cost? And secondly, who’s it for?

second

noun [C]  /ˈsek·ənd/ ( short form sec) us  

second noun [C] (TIME)

any of the 60 parts that a minute is divided into: She won by 22 seconds. A second is also any short period of time: I’ll be back in a second.

second

verb [T]  /ˈsek·ənd/ us  

second verb [T] (SUPPORT)

to make a formal statement of support for a suggestion made by someone else during a meeting in order to allow a discussion or vote: I second the motion to adjourn.
(Definition of second from the Cambridge Academic Content Dictionary © Cambridge University Press)
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