n.1 a European and American crow, Pica pica, with a long pointed tail and black and white plumage.
2 any of various birds with plumage like a magpie, esp. Gymnorhina tibicen of Australia.
3 an idle chatterer.
4 a person who collects things indiscriminately.
5 a the division of a circular target next to the outer one. b a rifle shot which strikes this.
Etymology: Mag, abbr. of Margaret + PIE(2)