high chair
US /ˈhaɪ ˌtʃer/
UK /ˈhaɪ ˌtʃer/

1.
silla alta, trona
a tall chair with a tray, designed for a baby or young child to sit in while eating
:
•
We bought a new high chair for the baby.
Compramos una nueva silla alta para el bebé.
•
The toddler sat happily in her high chair, banging her spoon.
El niño pequeño se sentó feliz en su silla alta, golpeando su cuchara.