The positive or negative direction of an electrical, acoustical or magnetic force. Two identical signals in opposite polarity are 180 degrees apart at all frequencies. Polarity is not frequency dependent.
A property associated with molecules when the centre of positive charge and the centre of negative charge don't coincide.
The direction of current flow in a DC circuit. By convention, current flows from plus to minus. Electron flow is actually in the opposite direction.
The loudspeaker cone moves forward when a positive voltage is applied between its red and black terminals, then it is said to have a positive polarity.
A microphone has positive polarity if a positive pressure on its diaphragm results in a positive output voltage.