Definition of jacket :
1. A garment resembling a waistcoat lined with cork, to serve as a life preserver; - called also cork jacket.
2. A short upper garment, extending downward to the hips; a short coat without skirts.
3. An outer covering for anything, esp. a covering of some nonconducting material such as wood or felt, used to prevent radiation of heat, as from a steam boiler, cylinder, pipe, etc.
4. In ordnance, a strengthening band surrounding and reenforcing the tube in which the charge is fired.
5. To put a jacket on; to furnish, as a boiler, with a jacket.
6. To thrash; to beat.
crown, surface, cap, chapiter, fell, pate, pileus, detonating device, top, diadem, treetop, crest, peak, crownwork, capital, poll, pennant, summit, tip, jacket crown, roof, detonator, hide, ceiling, hood, pelt
clothing (part of speech: noun)
footgear, pull-over, chapeau, cloak, halter, homburg, mackintosh, bowler, shawl, pinafore, habit, corset, camisole, wrapper, smock, beret, fedora, panties, wrap, boot, cape, bathrobe, overcoat, sarong, dinner jacket, garb, raiment, parka, ensemble, garment, bonnet, poncho, coat, evening gown, sari, clothing, gown, array, scarf, pea coat, blouse, dressing gown, slicker, kilt, shorts, pillbox, burnoose, tuxedo, raincoat, vesture, Afghan, pants, windbreaker, shirt, sweat shirt, trench coat, v-neck, vestment, pyjamas, crinoline, trousers, housecoat, dress, costume, shoes, kimono, headdress, smoking jacket, blue jeans, Stetson, doublet, brassiere, stockings, frock, turtle-neck, slacks, caftan, Jersey, trimming, petticoat, fez, sweater, duds, t-shirt, skirt, suit, topcoat, robe, apparel, clothes, fur, sports coat, chemise, nightgown, blazer, outfit, pajamas, jumper, attire, ulster, greatcoat, sweat suit, tunic, hat
- Throwing off my jacket, I jumped overboard at the same moment that Jack bounded into the sea. - "The Coral Island", R.M. Ballantyne.
- Oh, no; I have my seal- skin jacket on; and it is so sheltered here. - "Foul Play", Charles Reade Dion Boucicault.
- Bring me my jacket, he said, an' lay it o'er my face. - "One Day At Arle", Frances Hodgson Burnett.