1. short for communication or communications; informal term for a communication system or device
Usage: informal; often used in military, aviation, or technical contexts
2. short for commission or commissioner
Usage: informal; chiefly British

Examples

• The pilot checked the comm system before takeoff.
• We lost comm with the base for several minutes.
• The team used secure comm channels to coordinate the operation.
• She works for the local comm office.
• All personnel must maintain clear comm protocols during the mission.