Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “apostrophe”

See all translations

apostrophe

noun [C] uk   /əˈpɒs.trə.fi/ us    /-ˈpɑː.strə-/
B2 the symbol ’ used in writing to show when a letter or a number has been left out, as in I'm (= I am) or '85 (= 1985), or that is used before or after s to show possession, as in Helen's house or babies' hands: "It's" with an apostrophe means "it is" or "it has". sometimes used before s to show the plural of a number or a letter: There are two p's in "supper".
More examples
(Definition of apostrophe from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
What is the pronunciation of apostrophe?
Add Cambridge dictionaries to your browser to your website

Definitions of “apostrophe” in other dictionaries

Word of the Day

comma

the symbol , used in writing to separate parts of a sentence showing a slight pause, or to separate the single things in a list

Word of the Day

Lies, lies, lies!

by Kate Woodford,
February 25, 2015
​​​ According to sociologists (=people who study the relationships between people living in groups), we are good at lying. As a species, we have developed a remarkable ability to deceive each other (= persuade each other that something false is true). Being able to say things that are not true can help with

Read More 

showrooming noun

February 23, 2015
the activity of examining a product in a physical store and then making the purchase with an online retailer Amazon’s new smartphone is specifically designed to make showrooming fast and easy.

Read More