Definition of Notar in US English:

Notar

(also NOTAR)

noun

Aeronautics
  • Frequently attributive A trademark for a system of helicopter propulsion in which an anti-torque force is generated by the circulation of air through and around the tail boom, thus dispensing with the need for a tail rotor; a helicopter propelled by this system.

Origin

1980s; earliest use found in Business Week. Acronym from the initial letters of no tail rotor.

Pronunciation

Notar

/ˈnəʊtɑː/