balloon

US /bəˈluːn/
UK /bəˈluːn/
"balloon" picture
1.

palloncino

a small, thin rubber bag that is inflated with air or gas until it is round or oval in shape, used as a toy or for decoration

:
The child was holding a red balloon.
Il bambino teneva un palloncino rosso.
We decorated the room with colorful balloons for the party.
Abbiamo decorato la stanza con palloncini colorati per la festa.
2.

mongolfiera

a large bag filled with heated air or gas to make it buoyant, able to float in the air with a basket for passengers or equipment suspended below

:
They took a scenic ride in a hot-air balloon.
Hanno fatto un giro panoramico in mongolfiera.
The pilot prepared the hot-air balloon for takeoff.
Il pilota ha preparato la mongolfiera per il decollo.
1.

gonfiarsi, aumentare

swell out in a spherical shape; puff out

:
Her cheeks ballooned when she blew into the trumpet.
Le sue guance si gonfiarono quando soffiò nella tromba.
The company's profits ballooned after the successful marketing campaign.
I profitti dell'azienda sono aumentati dopo la campagna di marketing di successo.