1. not requiring a physical key to operate or access
2. lacking or without keys

Examples

• The new car has keyless entry and ignition.
• She unlocked her keyless door with a code.
• The keyless remote makes it easy to start the engine.
• Our office building uses keyless access cards.
• The keyless lock responds to fingerprint recognition.
• He preferred the keyless system over traditional keys.
• The keyless apartment entry impressed the tenants.