A business or industrial establishment whose employees are required to be labor union members as a precondition to employment.

(of a video recording or broadcast) Having captions that can only be seen with the appropriate equipment.

A circuit through which electrons can flow. / A complete electric circuit around which current can flow.

That consists of a closed circuit

Alternative spelling of closed-source

(physics, chemistry, engineering) A physical system whose interaction with its environment is limited to particular types of transfer, so that certain quantities are conserved within the system.

The display of text on a television or video screen, usually a transcription of the audio portion of a program as it occurs (either verbatim or in edited form), most frequently used by the deaf and language learners. Closed captions are encoded invisibly, and displayed by a decoder.

(television) Text which can be displayed on a television or other video screen with suitable equipment, usually a transcription or description of audio material.

(topology) A set whose complement is open.

(algebra, field theory, of a field) Which contains as an element every root of every nonconstant univariate polynomial definable over it (i.e., over said field).