noting or pertaining to RFID technology or devices that use radio waves to relay identifying information to an electronic reader, so that the device does not need to be in direct contact with the reader: contactless credit and debit cards.
Origin of contactless
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
referring to payment systems which use RFID technology and do not require the customer's signature or pin number
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012