advance - definition and synonyms

adjective [only before noun] 

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/ədˈvɑːns/
  1. 1
    done, obtained, or announced before a particular time or event

    We require 30 days’ advance notice if you wish to cancel your membership.

    There was no advance warning before the earthquake hit.

  2. 2
    sent to a place before a larger group that will arrive later

    an advance party/team/unit