Apron meaning : 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. The short cassock ordinarily worn by English bishops. A hard surface bordering a structure or area. The sides of a tree's canopy. The cap of a cannon; a piece of lead laid over the vent to keep the priming dry. A removable cover for the passengers' feet and legs in an open horse carriage. To cover with, or as if with, an apron.