n An article of clothing worn over the front of the torso and/or legs for protection from spills; also historically worn by Freemasons and as part of women's fashion.
n The short cassock ordinarily worn by English bishops.
n A hard surface bordering a structure or area.
n (aviation) The paved area of an airport, especially the area where aircraft park away from a terminal
n The spreading end of a driveway.
n The paved area below the yellow line on a race track.
n The loading, parking or roadway area immediately beside a railway station
n The portion of a stage extending towards the audience beyond the proscenium arch in a theatre.
n (pinball) A large decal toward the bottom of a pinball table.
n The sides of a tree's canopy.
n The cap of a cannon; a piece of lead laid over the vent to keep the priming dry.
n A removable cover for the passengers' feet and legs in an open horse carriage.
v (transitive) To cover with, or as if with, an apron.