Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “addition”

addition

noun [U] (CALCULATION)   /əˈdɪʃ·ən/
mathematics the process of calculating the total of a group of numbers: [U] We learn addition and subtraction in first and second grade.
(Definition of addition noun (CALCULATION) from the Cambridge Academic Content Dictionary © Cambridge University Press)
Focus on the pronunciation of addition

More American English definitions for “addition”

Definitions of “addition” in other dictionaries

Word of the Day

generous

willing to give money, help, kindness, etc., especially more than is usual or expected

Word of the Day

Blog

Read our blog about how the English language behaves.

Learn More

New Words

Find words and meanings that have just started to be used in English, and let us know what you think of them.

Learn More