Two-factor authentication. When elements representing two factors are required for authentication, the term two-factor authentication is applied â e.g. a bankcard (something the user has) and a PIN (something the user knows).
A body rub is a combination of pressures, tensions, motions and vibrations, performed manually or with mechanical devices. The various oils, lotions and liniments used during a massage are also referred to as body rub. These include grape seed or coconut oil, nut oils and mustard oil.
Definition of rub for English Language Learners. : 1  to move something (such as your hand or an object) back and forth along the surface of (something) while pressing. : 2  to move (two things) back and forth against each other. : 3  to move back and forth many times against something in a way that causes pain or damage.