Webster's Revised Unabridged Dictionary · 1913

Apron

Apron (ā"purn or ā"prun; 277) , noun

[Old English napron, Old French naperon, French napperon, dim. of Old French nape, French nappe, cloth, tablecloth, Late Latin napa, from Latin mappa, napkin, table napkin. See Map.]

1.
An article of dress, of cloth, leather, or other stuff, worn on the fore part of the body, to keep the clothes clean, to defend them from injury, or as a covering. It is commonly tied at the waist by strings.
2.
(Gunnery) Something which by its shape or use suggests an apron;
(a)
(Gunnery) The fat skin covering the belly of a goose or duck.
(b)
(Gunnery) A piece of leather, or other material, to be spread before a person riding on an outside seat of a vehicle, to defend him from the rain, snow, or dust; a boot.
(c)
(Gunnery) A leaden plate that covers the vent of a cannon.
(d)
(Gunnery) A piece of carved timber, just above the foremost end of the keel.
(e)
(Gunnery) A platform, or flooring of plank, at the entrance of a dock, against which the dock gates are shut.
(f)
(Gunnery) A flooring of plank before a dam to cause the water to make a gradual descent.
(g)
(Gunnery) The piece that holds the cutting tool of a planer.
(h)
(Gunnery) A strip of lead which leads the drip of a wall into a gutter; a flashing.
(i)
(Gunnery) The infolded abdomen of a crab. [Provincial English] — Hughes
The weather being too hot for the apron. — Halliwell