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On the hour Meaning in English

expression

ˈɑn/, /ˈɔn/ /ˈðə/, /ðə/, /ði/ /ˈaʊɝ/, /ˈaʊɹ
ON thuh OW-er
ˈɒn/ /ðə, ði/ /ˈaʊə
ON thuh OW-uh

Definition

At exactly the beginning of an hour, when the minute hand is on 12 (for example, 2:00, 3:00, not 2:15 or 3:45).

Usage & Nuances

Commonly used for schedules, instructions, and radio/TV announcements. It means 'exactly' at that hour. Do not use it for times like 4:15 or 7:30; use it only for full hours. Often paired with verbs like 'leave', 'start', or 'broadcast'.

Example Sentences

The train leaves on the hour every morning.

basic

The meeting will start on the hour.

basic

The bells ring on the hour.

basic

Our buses depart on the hour, so be ready a few minutes early.

natural

They do a news update on the hour every hour.

natural

Your favorite show will air on the hour tonight, don’t miss it!

natural