Webster Dictionary(0.00 / 0 votes)Rate this definition: 1  Tremulous(adj) shaking; shivering; quivering; as, a tremulous limb; a tremulous motion of the hand or the lips; the tremulous leaf of the poplar. 2  Tremulous(adj) affected with fear or timidity; trembling.
A mobile identification number (MIN) is a serial number that uniquely identifies a cell phone services subscriber within a mobile carrier network. It is used by mobile phone services providers to identify subscribers within its database, specifically when routing calls.
Caller ID. Definition - What does Caller ID mean? Caller ID is a telephone feature that displays a callerâs phone number on the recipient's phone device before the call is answered. The phone number, location and associated billing or subscriber name is shown on the handsetâs display or a separate caller ID box attached to the phone.