Aprons

noun

1. 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.
2. The short cassock ordinarily worn by English bishops.
3. A hard surface bordering a structure or area.
4. The sides of a tree's canopy.
5. The cap of a cannon; a piece of lead laid over the vent to keep the priming dry.