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second

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noun [countable] British English pronunciation: second /ˈsekənd/ 
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singularsecond
pluralseconds
  1. 1
    an extremely short period of time that is one of the 60 parts in a minute

    She won the 400 metres race in 51 seconds.

    Each commercial lasts for 30 seconds.

    1. a.
      an extremely short period of time

      Just give me a second to put my coat on.

      I'll be with you in two seconds.

      seconds later/within seconds (=almost immediately):

      The computer crashed seconds later.

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