n.
Looker-on,
Did not this fatal war affront thy coast,
Yet sattest thou an idle looker-on ? Fairfax. [ 1913 Webster ]
n. A person who observes an event; a looker-on; a spectator. [ 1913 Webster ]
n. One who overlooks. [ 1913 Webster ]
n. (Mining) A person who inspects a mine daily; -- called also