1. a device or substance that gives off or releases something, especially light, heat, radiation, or particles
2. in electronics, the part of a transistor that releases charge carriers
Usage: electronics

Examples

• The LED is a highly efficient light emitter.
• Carbon dioxide is a major greenhouse gas emitter.
• The factory was identified as the largest pollution emitter in the region.
• Scientists studied the alpha particle emitter in the laboratory.
• The transistor’s emitter controls the flow of current.
• Solar panels work by capturing energy from various light emitters.
• The radio tower serves as a powerful signal emitter.