o'clock

US /əˈklɑːk/
UK /əˈklɑːk/
"o'clock" picture
1.

horas

used after a number from one to twelve to indicate a particular hour when telling the time

:
It's three o'clock.
São três horas.
The meeting starts at nine o'clock in the morning.
A reunião começa às nove horas da manhã.