What is "contactless"

a. 1 That does not use or require contact in order to operate. 2 That has no contact(s).

Contactless may refer to:

• Contactless smart card
• Proximity card, a contactless integrated circuit device used for security access or payment systems
• Contactless payment, systems which use RFID for making secure payments
• Radio-frequency identification, an automatic identification method
• Near Field Communication, a short-range wireless technology