o'clock
🇺🇸
/əˈklɑːk/
🇬🇧
/əˈklɒk/
Said after stating the hour to tell the time.
The alarm goes off at 7 o'clock every morning.
毎朝7時にアラームが鳴ります。
Used after a number to say what time it is.
The store opens at 9 o'clock sharp.
店は9時に正確に開きます。