Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “flag”


noun [C]  /flæɡ/ us  

flag noun [C] (SYMBOL)

a piece of cloth with a special color and pattern, used as a symbol esp. to represent a particular country or group: the American flag The man waved a red warning flag.


verb  /flæɡ/ (-gg-) us  

flag verb (MARK)

[T] to mark something so it can be found easily among other similar things: She asked me to flag the names that appear on both lists.

flag verb (BECOME TIRED)

[I] to become tired or less strong: My interest in the story flagged.
(Definition of flag from the Cambridge Academic Content Dictionary © Cambridge University Press)
What is the pronunciation of flag?
Add Cambridge dictionaries to your browser to your website

Definitions of “flag” in other dictionaries

Word of the Day


(a person or thing) coming before all others in order, time, amount, quality, or importance

Word of the Day

Countability – grammar codes

by Dom Glennon​​,
November 26, 2014
Advices and informations Have you ever noticed strange codes in square brackets on entries in Cambridge Dictionaries Online and wondered what they mean? These are grammar codes, giving you a brief summary of how that word behaves grammatically. More information can be obtained by hovering your cursor over the code, and there’s

Read More 

ped-text verb

November 24, 2014
to text someone while walking I’m ped-texting, I’m looking down at my phone, 75 percent of the time.

Read More