Definition of contactless:
(adj) :
(of transactions) Happening without physical contact at the point of sale.
(adj) :
(of a delivery, exchange, etc., of physical goods) Conducted without human-to-human contact to improve ease of use or reduce the potential spread of a contagious disease; contact-free.
(adj) :
That does not use or require contact in order to happen or operate.
(n) :
A technology for paying for goods etc. while physically present at the point of interaction but without the need for physical contact.
(adj) :
That has no contact or contacts.