Bōn'net, n.

n. [Fr. bonnet, Pr. boneta, Sp. & Pg. bonete. Originally the name of a stuff. Guil. de Nanglaco (a. 1300): “Nunquam indutus est squarleto vel panno viridi seu bonnetta.” Le Roman de Guillaume au court nez, dans le charroy de Nismes: “Un chappelet de bonnet en sa teste.”]

1. A cap or covering for the head, in common use before the introduction of hats, and still used by the Scotch. “And plaids and bonnets waving high.” W. Scott.
2. A covering for the head, worn by females.
3. (Fort.) A part of a parapet considerably elevated to screen the other part and its terre-pleine, usually from enfilade fire.
4. (Naut.) An addition to a sail, or an additional part laced to the foot of a sail, in small vessels, and in moderate winds.
5. A plate or a dome-shaped casing to cover an opening or an inclosed part.
6. A frame of wire netting over a locomotive chimney, to prevent the escape of sparks.