elk

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A large reddish-brown or grayish deer (Cervus canadensis) of western North America, having long, branching antlers in the male. The elk is sometimes considered a subspecies of the closely related red deer.
• noun Chiefly British The moose.
• noun A light, pliant leather of horsehide or calfskin, tanned and finished to resemble elk hide.

from The Century Dictionary.

• noun A kind of yew of which bows are made. Halliwell.
• noun [capitalized] A member of a benevolent and fraternal society known as the Benevolent and Protective Order of Elks, organized in New York in 1868. Its membership is restricted to citizens of tho United States.
• noun The wild swan, or hooper, Cygnus ferus. Montagu.
• noun Properly, the largest existing European and Asiatic species of the deer family, or Cervidæ, Alces malchis (formerly called Cervus alces).
• noun In America, the wapiti, Cervus canadensis, a very different animal from the elk proper, representing the red deer or stag of Europe, C. elaphus. See wapiti and Alces.
• noun In Asia, among the Anglo-Indians, some large rusine or rucervine deer or stag, as the sambur, Cervus aristotelis.
• noun Same as eland, 1.

from the GNU version of the Collaborative International Dictionary of English.

• noun (Zoöl.) A large deer, of several species. The European elk Alces alces (formerly Alces machlis or Cervus alces) is closely allied to the American moose. The American elk, or wapiti (Cervus Canadensis) the largest member of the deer family, has large, spreading antlers and is closely related to the European stag. See moose, and wapiti.
• noun (Paleon.) a large, extinct, Quaternary deer (Cervus giganteus) with widely spreading antlers. Its remains have been found beneath the peat of swamps in Ireland and England. See Illustration in Appendix; also Illustration of Antler.
• noun (Zoöl.) the eland.
• noun (Zoöl.) The European wild or whistling swan (Cygnus ferus).
• proper noun a member of the fraternal organization named Benevolent and Protective Order of Elks, supporting various services to their communities.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun UK The largest member of the deer family (Alces alces); a moose.
• noun North America The common wapiti (Cervus canadensis); the second largest member of the deer family, smaller only than a moose. Elk never have flat antlers; moose do.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun large northern deer with enormous flattened antlers in the male; called `elk' in Europe and `moose' in North America
• noun large North American deer with large much-branched antlers in the male
• noun common deer of temperate Europe and Asia