n. & v.
1. a a sleeved short outer garment. b a thing worn esp. round the torso for protection or support (life-jacket).
2 a casing or covering, e.g. as insulation round a boiler.
4 the skin of a potato, esp. when baked whole.
5 an animal's coat.
--v.tr. (jacketed, jacketing) cover with a jacket.
Phrases and idioms:
jacket potato a baked potato served with the skin on.
Etymology: ME f. OF ja(c)quet dimin. of jaque JACK(2)