base - definition in the American English Dictionary - Cambridge Dictionaries Online

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English definition of “base”

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base

noun

base noun (BOTTOM)

 us   /beɪs/ [C] the bottom of an object; the part on which it rests: This lamp has a heavy base so it won’t tip over. geometry us   /beɪs/ [C] A base angle is one of the two equal angles that include the bottom of an isosceles triangle .

base noun (MAIN PLACE)

 us   /beɪs/ [C] the place from which a business operates or a person works: We have an office in San Diego, but Washington is still our base.  us   /beɪs/ [C] A base is also a place from which the military operates that provides weapons storage and housing: The military has bases all over the US.

base noun (SUBSTANCE)

biology /beɪs/ [C] one of four chemical substances that make up the part of DNA and RNA that controls the structure of genes

base noun (CHEMICAL)

chemistry /beɪs/ [C/U] any of various chemical substances that have the opposite effect or chemical behavior as that of an acid

base noun (NUMBER)

mathematics /beɪs/ [C] a number that is multiplied by itself: In 6³, 6 is the base and it is multiplied by 6 three times.

base noun (MAIN PART)

 us   /beɪs/ [C usually sing] the main part of something, or the people or activities that form the main part of something: The sauce has an olive oil base. Tourism remains the city’s economic base. He’ll need a wide base of regional support to win the election.

base noun (WORD PART)

grammar /beɪs/ [C] a word or word part to which prefixes and endings may be added to make new words, as in "do," the base of "redo" and "doable"

base noun (BASEBALL)

 us   /beɪs/ [C] (in the game of baseball) one of the four angles of a square, all of which a player must touch in order to score: He reached first base on a single.

base

verb [T always + adv/prep]  us   /beɪs/
to establish a place as the place from which a business operates or a person works: Where is your company based?
(Definition of base from the Cambridge Academic Content Dictionary © Cambridge University Press)
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