Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “balloon”

balloon

noun [C] uk   /bəˈluːn/ us  
A2 a small, very thin rubber bag that you blow air into or fill with a light gas until it is round in shape, used for decoration at parties or as a children's toy: We tied balloons and streamers to the ceiling ready for the party. (also hot-air balloon) a very large balloon that is filled with hot air or gas and can carry people in a basket (= open container ) hanging under it: People first flew in a balloon in 1783. a speech bubble

balloon

verb [I] uk   /bəˈluːn/ us  
to get bigger and rounder: I ballooned when I was pregnant with my second baby. to quickly increase in size, weight, or importance: The rumours soon ballooned into a full-blown scandal.
(Definition of balloon from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
What is the pronunciation of balloon?
Add Cambridge dictionaries to your browser to your website

Definitions of “balloon” in other dictionaries

Word of the Day

hello stranger

said to a person that you know but have not seen for a long time

Word of the Day

Come on – you can do it! Phrasal verbs with ‘come’.

by Liz Walter​,
November 19, 2014
As part of an occasional series on the tricky subject of phrasal verbs, this blog looks at ones formed with the verb ‘come’. If you are reading this blog, I’m sure you already know come from, as it is one of the first things you learn in class: I come from Scotland/Spain.

Read More 

silver splicer noun

November 17, 2014
informal a person who marries in later life Newly retired and now newlywed – rise of the ‘silver splicers’ Reaching pension age becomes a trigger to tie the knot as baby-boomers begin to redefine retirement

Read More