1. a device or instrument that produces images, especially one that captures or records visual information
Usage: commonly used in technical and scientific contexts
2. a person who creates or produces images, such as a photographer or visual artist
Usage: less common than the technical sense

Examples

• The satellite's thermal imager detected heat signatures in the building.
• Modern smartphones include a high-resolution imager in their cameras.
• The medical imager allowed doctors to see inside the patient's body without surgery.
• The infrared imager revealed temperature differences across the surface.
• As a skilled imager, she captured stunning photographs of nature.
• The telescope's imager produced detailed images of distant galaxies.