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base [ˈbeɪs]

1 base noun
  • the bottom or lowest part of something : the part on which something rests or is supported—usually singular —often used figuratively
  • something (such as a group of people or things) that provides support for a place, business, etc.—usually singular
  • a main ingredient to which other things are added to make something—usually singular
2 base verb
  • to have a particular place as the main place where a person works or lives or where a business operates —often used as (be) based
3 base adjective
  • not honest or good
  • having low quality and value