See under magpie (def 1).
either of two corvine birds, Pica pica (black-billed magpie) of Eurasia and North America, or P. nuttalli (yellow-billed magpie) of California, having long, graduated tails, black-and-white plumage, and noisy, mischievous habits.
any of several related corvine birds.
any of several black-and-white birds not related to the true magpies, as Gymnorhina tibicen, of Australia.
an incessantly talkative person; noisy chatterer; chatterbox.
a person who collects or hoards things, especially indiscriminately.
Western U.S. a black-and-white cow or steer, as a Holstein.
any of various passerine birds of the genus Pica, esp P. pica, having a black-and-white plumage, long tail, and a chattering call: family Corvidae (crows, etc)
any of various similar birds of the Australian family Cracticidae See also butcherbird (sense 2)
any of various other similar or related birds
(often capital) a variety of domestic fancy pigeon typically having black-and-white markings
(Brit) a person who hoards small objects
a person who chatters
the outmost ring but one on a target
a shot that hits this ring
Whan pyes chatter vpon a house it is a sygne of ryghte euyll tydynges. 
Divination by number of magpies is attested from c.1780 in Lincolnshire; the rhyme varies from place to place, the only consistency being that one is bad, two are good.
a weedy twining vine, Polygonum convolvulus, native to Europe and widely naturalized in North America. black bryony. noun a twining polygonaceous European plant, Polygonum convolvulus, with heart-shaped leaves and triangular black seed pods
sweet birch. Historical Examples The Louisa Alcott Reader Louisa M. Alcott Fisherman’s Luck Henry van Dyke The Box-Car Children Gertrude Chandler Warner The College, the Market, and the Court Caroline H. Dall The Maid-At-Arms Robert W. Chambers
a common European thrush, Turdus merula, the male of which is black with a yellow bill. any of several American birds of the family Icteridae, having black plumage. Compare crow blackbird, red-winged blackbird, rusty blackbird. any of several other unrelated birds having black plumage in either or both sexes. (formerly) a person, especially a Kanaka, […]
(formerly) a person or ship illegally engaged in the slave trade, especially in the Pacific. Historical Examples The Pirate Shark Elliott Whitney The Best Short Stories of 1921 and the Yearbook of the American Short Story Various