| loon | large somewhat primitive fish-eating diving bird of the northern hemisphere having webbed feet placed far back |
|---|---|
| loon | a worthless lazy fellow |
| loon | a person with confused ideas |
| loon | someone deranged and possibly dangerous |
| loon | someone deranged and possibly dangerous |
| loon | informal or slang terms for mentally irregular |
| loon | pejorative terms for an insane asylum |