on time
prep. phr.. A2 Elementary Oxford
prep. phr.. To do something or arrive somewhere at the correct, planned time — not late.
prep. phr.. An adverbial phrase indicating punctuality; occurring at the exact scheduled or agreed-upon moment.
The train arrived on time.
She always hands in her homework on time.
Despite the traffic, the keynote speaker arrived on time for her presentation at the international conference.
Usage
This phrase is often used with verbs like 'arrive', 'start', 'finish', and 'submit'.
Teaching tip
Contrast with 'in time', which means 'with enough time to spare before a deadline', whereas 'on time' means 'at the specific, scheduled time'.
Pitfall
I hope the bus comes in time.I hope the bus comes on time.Use 'on time' for scheduled events; 'in time' means 'early enough for something else'.