plural of back course

(aviation) The approach course formed by the rear lobe of the signal pattern of a localizer antenna array (the portion of the localizer signal emitted from the rear face of the antenna array), oriented in the reciprocal direction to the primary approach course (i.e., the back course - if a usable back course exists at all - will be rotated 180° from the primary course). Not all localizers produce a usable back-course signal; newer equipment radiates very little signal into the rear and side lobes, not enough to allow for a back-course approach.

Used other than figuratively or idiomatically: see move, back. / (transitive, US) To reschedule (something) to a later date or time.

plural of backed blade

(archaeology) A prehistoric flint knife with one edge blunted (backed) and the other sharpened.

(of a form of entertainment) Enjoyed passively by the spectator, user, etc.

Alternative form of leanback

plural of back slang

plural of back pay

present participle of stab in the back