base - definition and synonyms

noun [countable] 

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  1. 1
    the bottom part, edge, or surface of something

    a tall cliff, with a narrow footpath at its base

    base of:

    The pituitary gland is at the base of the brain.

    The manufacturer’s name is printed on the base of the vase.

    1. a.
      the bottom part or section of something, that supports the rest of it

      The statue stands on a large round base.

      base of:

      The base of your bed is as important as the mattress.

  2. 2
    a place from which an activity can be planned, started, or carried out
    base for:

    Terrorists had been using the warehouse as a base for their operations.

    Hikers find this a convenient base for their mountain expeditions.

    1. a.
  3. 3
    a set of ideas, facts, achievements etc from which something can develop
    base for:

    The report will give us a base for building a better healthcare system.

    base of:

    a broad base of experience/knowledge/expertise

     Synonyms and related words
  4. 4
    a group of people who use a particular service or do a particular job

    They have built a loyal customer base.

    base of:

    The team has a base of strong players.

    1. a.
      a group of people who support someone or something, for example with money or votes

      He has a large base of support within the party.

    2. b.
  5. 5
    one of the four places on a baseball or rounders field that a player must touch in order to score points
    See also first base
  6. 6
    a food or substance that is the main food or substance to which other things are added

    Use the stock as a base for your sauce.

    paint with a water base

  7. 7
    chemistry a chemical substance that turns red litmus paper blue. All alkalis are bases.
  8. 8
    maths a number that is used to form a system of counting. The usual system of counting uses base 10, and the binary system used in computers uses base 2.