onboardclock
nounUK /ˌɒnbɔːd ˈklɒk/
US /ˌɑːnbɔːrd ˈklɑːk/
A clock that is built into a car, plane, or ship to tell the time.
The pilot checked the onboard clock before takeoff.
RELATED WORDS
OTHER MEANINGS
2. A timing device inside a computer or machine that keeps track of time.
The onboard clock keeps the device's time accurate even when it is offline.
3. A clock mounted inside a spacecraft to help track mission time.
Astronauts rely on the onboard clock to schedule their daily tasks.
4. A small clock fixed inside a train cabin for passengers and crew.
The onboard clock showed that the train was running five minutes late.