Wind-tunnel definition

A chamber through which air is forced at controlled velocities in order to study the effects of aerodynamic flow around airfoils, scale models, or other objects.

A tunnel-like chamber through which air is forced and in which airplanes, motor vehicles, etc., or their scale models, are tested to determine aerodynamic effects.

A chamber through which air is blown at controlled speeds to simulate the motion of objects placed in the chamber through the air, used to study the aerodynamic properties of objects such as automobiles, airplanes, and missiles.