Definitions for "Barn door"
Keywords:  spotlight, fresnel, flaps, beam, lenses
An arrangement of four metal leaves placed in front of the lenses of fresnel spotlights (qv) to control the shape of the light beam.
Any favorable WOOD directly in front of the key pin(s), (ROAD BLOCK.)
An arrangement of four metal leaves placed in front of the lenses of certain kinds of spotlight to control the shape of the light beam.
Keywords:  climber, pivot, swing, hinge, chuckles
An off balance move that causes a climber to pivot on two points of contact. The occurring result looks like an Opening barn door.
the large sliding door of a barn
a door on a barn