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English definition of “base”

base

noun uk   /beɪs/ us  

base noun (BOTTOM)

B2 [C] the bottom part of an object, on which it rests, or the lowest part of something: a crystal glass with a heavy base At the base of the cliff was a rocky beach. This cream provides an excellent base for your make-up (= a good bottom layer on which other layers can be put).Surfaces of objectsEdges and extremities of objects

base noun (MAIN PLACE)

B2 [C] the main place where a person lives and works, or a place that a company does business from: I spend a lot of time in Brussels, but London is still my base. Nice is an excellent base for (= place to stay when) exploring the French Riviera.Places involved in military activity

base noun (MILITARY)

a place where there are military buildings and weapons and where members of the armed forces live: an old naval/military base

base noun (IN BASEBALL)

[C] one of the four positions on a square that a player must reach to score a point in the game of baseballBaseball and roundersGeneral terms used in ball sports

base noun (NECESSARY PART)

[C] the activity or people from which someone or something gets most of their support, money, etc.: A strong economy depends on a healthy manufacturing base. We're aiming to expand our customer base.Origins and sources

base noun (MAIN PART)

C2 [C usually singular] the main part of something: a cocktail with a whisky baseImportant and essential thingsInformation and messages

base noun (IN MATHEMATICS)

[C usually singular] specialized mathematics the number on which a counting system is built: A binary number is a number written in base 2, using the two numbers 0 and 1.Terms for numbers

base noun (IN CHEMISTRY)

[C] specialized chemistry a chemical that dissolves in water and combines with an acid to create a saltTypes of chemicalSpecific chemicals, chemical compounds and gasesSubstances and structures in the body

base

adjective uk   /beɪs/ literary us  
not showing any honour and having no morals: I accused him of having base motives.Morally wrong and evilDishonest
basely
adverb uk   /ˈbeɪs.li/ us  
baseness
noun [U] uk   /ˈbeɪs.nəs/ us  

base

verb [T usually + adv/prep] uk   /beɪs/ us  
B2 to have a particular town or area, etc. as the main place that you live and work in, or where you do business from: Where is your firm based? He was based in (= he lived in or was at a military establishment in) Birmingham during the war.Placing and positioning an object
Phrasal verbs
(Definition of base from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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