base Meaning in Cambridge American English Dictionary
Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

Meaning of "base" - American English Dictionary

See all translations

basenoun

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.

baseverb [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)
What is the pronunciation of base?
Add Cambridge dictionaries to your browser to your website

Definitions of “base” in other dictionaries

Word of the Day
straight

the straight part of a racetrack (= the track on which competitors race)

Word of the Day

Are you a glass-half-full person? (Everyday Idioms)
Are you a glass-half-full person? (Everyday Idioms)
by Kate Woodford,
July 29, 2015
A reader of this blog recently asked for a post on idioms that are used in everyday English. This seemed like a reasonable request. After all, if you are going to make the effort to learn a set of English idioms, you want those idioms to be useful. The question, then, was

Read More 

exoskeleton noun
exoskeleton noun
July 27, 2015
a robotic device which goes around the legs and part of the body of a person who cannot walk and allows them to move independently and in an upright position The device, known as an exoskeleton, is strapped to the outside of a person’s limbs and can then be controlled by them.

Read More