a small, thin rubber or plastic bag that you blow air into so that it becomes larger and rounder and can be used as a decoration or a children's toy, a large bag filled with hot air or gas that rises into the sky and is used for entertainment or travel

let the balloon go, burst someone's balloon, go down like a lead balloon

Formal and Informal Expressions of balloon

In different contexts, you can replace 'balloon' with suitable alternatives. In a more informal setting, 'blow-up, ball' is apt.

balloon: Explore its Definition & Usage

balloon Definition

1a small, thin rubber or plastic bag that you blow air into so that it becomes larger and rounder and can be used as a decoration or a children's toy
2a large bag filled with hot air or gas that rises into the sky and is used for entertainment or travel

Using balloon: Examples

Take a moment to familiarize yourself with how "balloon" can be used in various situations through the following examples!

Example
The children were playing with balloons at the party.
Example
We went on a hot air balloon ride over the mountains.
Example
The parade featured giant balloons of cartoon characters.
Example
The balloon slowly drifted away into the sky.

balloon Synonyms and Antonyms

Synonyms for balloon

Phrases with balloon

let the balloon go
to release something that you have been holding onto or keeping under control
Example
She finally let the balloon go and quit her job to travel the world.
burst someone's balloon
to spoil someone's plans or hopes
Example
I hate to burst your balloon, but we can't afford to go on vacation this year.
go down like a lead balloon
to be very unsuccessful or unpopular
Example
His joke went down like a lead balloon and nobody laughed.

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Summary: balloon in Brief

A 'balloon' [bəˈluːn] is a small, thin rubber or plastic bag that can be inflated with air and used as a decoration or toy. It can also refer to a large bag filled with hot air or gas that rises into the sky and is used for entertainment or travel. Phrases like 'let the balloon go' and 'burst someone's balloon' are idiomatic expressions that convey releasing control or spoiling someone's plans.