Revolving Door 1 : (Build) A door consisting of four vanes at right angles to each other that rotate as a unit about a central axis. A person using the door pushes against a vane, rotates the assembly, and passes through
H. J. Porter (Chairman - Technical Committee), Dictionary of Fire Technology, The Institution of Fire Engineers, The Victory Press (Leicester) Ltd. 1979 UK. (Fr Tech - Brit) {81}