Theatre Terms

image of question markHere you'll find over 1000 definitions of theatrical terms, from Aside, Beam Angle, and Camlock, to Upstaging, VU Meter, and Wagon.  Fully searchable, our glossary is helpful for technical staff, directors, actors, producers, or anyone wanting to better understand the inner workings of theatre.

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Term Definition Cross Reference Link
BOOM 1) A light tree or vertical scaffolding pole on which horizontal boom arms can be mounted, carrying instruments. Often used behind wings for side-lighting etc. Booms have a base plate or stand at the bottom and are tied off to the grid or fly floor at the top (not always necessary for short booms). Booms can also be fixed to the rear of the proscenium arch or hanging from the ends of lighting bars. 2) An arm mounted on a microphone stand. Boom
BOX BOOM A front-of-house vertical lighting position (predominantly sidelight). Boom
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