1. A solid bony branched horn found in pairs on the head of an animal, especially a male, of the deer family, including caribou and elk. Antlers are shed each year.
2. Etymology: from Anglo-French auntiler, from Old French antoillier; possibly from Vulgar Latin anteoculare; literally, "horn growing before the eyes" ("in front of the eyes") from Latin ante, "before" + ocularis, "of the eyes".