What does not in service mean?
not in service
Synonyms: out of service
Definition
Of a bus, a train or a tram: running empty, without taking passengers, usually on its way back to the depot.
Example sentences
Why is it that whenever I'm in a hurry, the only trams that come by are not in service?
Why is it that whenever I'm in a hurry, the only trams that come by are not in service?
I waved at a bus for ages before I noticed it was out of service.
I waved at a bus for ages before I noticed it was out of service.