(ter′ē·ər) noun
A small, active, wiry dog of several breeds, formerly used to hunt burrowing animals and noted for the courage and eagerness with which it “goes to earth” in pursuit of its quarry. See AIREDALE, DANDIE DINMONT, SCHNAUZER. [<OF <L terrarius pertaining to earth. See TERRIER².]
Welsh Terrier
Airedale
Lakeland Terrier
Irish Terrier
West Highland White Terrier
Cairn Terrier
Yorkshire Terrier
Skye Terrier
Norwich Terrier
Dandie Dinmont
Boston Terrier
Bull Terrier
Scottish Terrier
Schnauzer
Wire-haired Fox Terrier
Smooth-haired Fox Terrier
Bedlington Terrier
Manchester Terrier
Sealyham Terrier
Kerry Blue Terrier

—Bedlington terrier
A liver–colored or blue terrier with muscular body, long neck, narrow skull, and thick coat. It is very game in attacking badgers, foxes, or vermin. [<Bedlington, shire in Northumberland County, England]
—Boston terrier
A small, non–sporting terrier of dark brindle color marked with white, crossbred from the English bulldog and the white English terrier, and having a square skull, short tail, and short, smooth coat.
—bull terrier
A white terrier first crossbred from the bulldog and the white English terrier, then crossed with the Spanish pointer. It has a muscular, well–balanced body, long head, flat skull, and short, stiff coat.
—Cairn terrier
A small, stocky, alert terrier of Scotland, having a broad head, a rough outer coat of any color except white, pointed ears, and a black nose: used as a retriever and to exterminate vermin.
—Clydesdale terrier
A straight–eared, silky–haired dog, with tiny, erect ears and short legs, bred from but smaller than the Skye terrier.
—fox terrier
A small white terrier, either smooth or wire–haired: formerly bred for bringing the fox out of his burrow, now usually a pet.
—Irish terrier
A small, red or golden–red, rough–haired terrier having a rather long body built on racing lines: used for hunting small or big game and vermin and also for retrieving in water.
—Kerry blue terrier
A breed of terrier originating in County Kerry, Ireland, having a long straight back, straight legs, long head, and soft, wavy, bluish–black coat: used to hunt and retrieve small game and as a herd dog, watchdog, and companion.
—Lakeland terrier
A courageous breed of terrier having a dense, harsh coat of black, blue, or grizzle and tan: originally from Cumberland County, England, and used in hunting the otter or the fox.
—Lhasa terrier
A breed of terrier native to Tibet, with a heavy yellow, black, white, or brown coat, straight forelegs, and tail curled over its back.
—Manchester terrier
A small, speedy, short–haired, black–and–tan terrier, originally bred in Manchester, England, and known at one time as Black–and–Tan terrier.
—Norwich terrier
A breed of small, wire–haired terrier, native in England, and usually red, black–and–tan, or grizzled: used in hunting.
—Scottish terrier
A Scotch breed of small, wire–haired, alert, and intelligent terrier, having a compact body, short legs, small eyes and skull, and gray, brindled grizzled, black, sandy, or wheaten coat. Also Scotch terrier, Scottie.
—Sealyham terrier
A terrier of mixed ancestry, native of Sealyham, Wales, with short legs, a wide skull, square jaws, and wiry coat, usually solid white, but sometimes marked with lemon or brown on ears and head: used in hunting badger, fox, and otter.
—Skye terrier
The smallest, lowest–set, and longest–bodied of all useful terriers, unrivaled for acute scent, hearing, sight, and alacrity. Its coat is long and straight, usually blue, gray, or fawn with black points.
—Welsh terrier
An old breed of rough-haired, black–and–tan terrier, a native of Wales, having a broader head than a fox terrier and a flat skull: used for hunting otter, fox, and badger.
—West Highland white terrier
A breed of small terrier, with long, low, compact body, short legs, and a pure white, coarse, wiry outer coat: said to have existed in Scotland prior to 1600 A.D.
—Yorkshire terrier
A toy breed, among the smallest of all varieties of terriers. It has semi–erect ears and a coat of long, silky, dark steel–blue hair, with golden tan on chest and head. At first a pet of the working classes, especially of weavers, it later became a fashionable pet.

(ter′ē·ər) noun Law
1. A land survey setting forth in detail the number of acres, names of tenants, etc., in a given district: the terrier of glebe lands.
2. A book containing the lists of the lands either of a private person or a corporation; a rent roll. [<OF, list of tenants <LL terrarius a roll describing landed property <L, pertaining to land <terra land]