noun

• Any of various large species of deer such as the red deer, moose or wapiti (see usage notes).
• Any of the subspecies of the moose (Alces alces, alternatively named Eurasian elk to avoid confusion with the wapiti), that occurs only in Europe and Asia.
• (chiefly Europe, Commonwealth) Any moose (Alces alces), the largest member of the deer family.
• (Canada, US) common wapiti (Cervus canadensis), the second largest member of the deer family, once thought to be a subspecies of red deer.
• (British India) Sambar (Cervus unicolor).
• A member of the Benevolent and Protective Order of Elks, an American fraternal order.
• (informal) An Acorn Electron computer.
• (Canadian football) A team member of the Canadian Football League's Edmonton Elks (formerly known as the Eskimos).
• A surname from Dutch.
• (obsolete) Alternative form of elke (the common swan (Cygnus cygnus, syn. Cygnus ferus)) [(obsolete) The European wild, whistling, or common swan (Cygnus cygnus, syn. Cygnus ferus).]
• (computing) Acronym of Elasticsearch, Logstash, and Kibana.