loon
Concise Oxford English Dictionary © 2008 Oxford University Press:
loon1
▶noun informal a silly or foolish person.
– origin C19: from loon2 (referring to the bird's actions when escaping from danger), perh. influenced by loony.
Concise Oxford English Dictionary © 2008 Oxford University Press:
loon2
▶noun North American term for diver (sense 2).
– origin C17: prob. by alt. of Shetland dial. loom, denoting especially a guillemot or a diver.
Concise Oxford English Dictionary © 2008 Oxford University Press:
loon3
▶verb Brit. informal act in a foolish or desultory way.
– origin 1960s: of unknown origin.
'loon' also found in these Oxford entries:
