us​/beɪs/[ C ] the bottom of an object; the part on which it rests:

geometry us​/beɪs/[ C ] A base angle is one of the two equal angles that include the bottom of an isosceles triangle.

us​/beɪs/[ C ] the place from which a business operates or a person works:

us​/beɪs/[ C ] A base is also a place from which the military operates that provides weapons storage and housing:

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

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

mathematics /beɪs/[ C ] a number that is multiplied by itself:

us​/beɪs/[ C usually sing ] the main part of something, or the people or activities that form the main part of something:

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"

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:

to establish a place as the place from which a business operates or a person works:

the place where a company does its main business from:

all the resources or people that a company, etc. depends on in order to be successful:

a positive feature of a situation that makes it possible for something else to grow and develop:

FINANCE an amount of money or a number that is used to compare other amounts of money or numbers to, especially as a way of measuring whether prices or numbers have increased or decreased:

to have a particular country, city, etc. as the main place that you do business from: