Definitions

1. adjective

requiring or using no key; especially, requiring no key to operate

“The new smart car is keyless, so you can unlock it with a smartphone app.”

2. noun

a person who has no key, especially one who has lost their keys

“I’m a keyless driver, I forgot my car keys at home.”

3. adverb

without the need for a key

“The new lock is keyless, it uses a biometric scan instead.”