busy signal
noun[Cusually singular]
USuk/ˈbɪz.i ˌsɪɡ.nəl/us/ˈbɪz.i ˌsɪɡ.nəl/asoundthatmeansthat thephoneyou arecallingis being used
(电话)忙音Unavailable and inaccessible
- busy
- discontinued
- gone
- impenetrable
- inaccessibility
- inaccessible
- irrecoverable
- lost
- off
- out-of-pocket
- oversubscribed
- reserved
- season
- spoken for
- tie
- unaccounted for
- unavailability
- unavailable
- unreachable