balloon · noun C /bəˈluːn/
balloon
A2 a small, colored rubber bag that you blow air into or fill with air until it is round in shape, used for decoration at parties or as a children's toy
Dictionary example:
We tied balloons and streamers to the ceiling ready for the party.
Learner example:
In the party room there were many balloons. (Key English Test; A2; Hindi)