skeletonskel‧e‧ton /ˈskɛlət˺n/ ●●○ noun 1 [countable] science, biology the structure consisting of all the bones in a human or animal body: the human skeleton2have a skeleton in the closet to have a secret about something embarrassing or unpleasant that happened to you in the past3skeleton staff/crew/service only enough people to keep an operation or organization working [Origin: 1500–1600 Modern Latin, Greek, from skeletos “dried up”]—skeletal adjective