An abbreviation for decibel millivolt. The level at any point in a system expressed in dB's above or below a 1 millivolts (dBmV). Zero dBmV is equal to 1 millivolt across 75 ohms. The level at any point in a system expressed in dBs above or below a 1millivolt/75 ohm standard is said to be the level in decibelmillivolts or dBmV.