A disconnect between members of one generation and members of the next based on the later generation developing habits, attitudes, and preferences inconsistent with the experience of the former.

(idiomatic) To expose oneself for the protection of something; to make defence against any assailing danger; to take the place of a fallen defender or supporter.

A turning lathe with a deep notch in the bed to allow turning a short object of large diameter.

plural of gap sheet

(business) A file on an employee indicating areas in which they require further training.

A small village in Northumberland, England (OS grid ref NZ0386).

(geography) A dry valley once occupied by a stream or river, since captured by another stream.

plural of gap year

(biology) A specialized connection between cells that allows for intercellular communication, or the transfer of low molecular-weight substances

(rail transport) Be careful of the gap between the vehicle and the platform it is near, in boarding or alighting; wide gaps between train and platform are caused by curved tracks and platforms in some stations.