WordWeb Online

1. A worthless lazy fellow
    
2. Large somewhat primitive fish-eating diving bird of the northern hemisphere having webbed feet placed far back; related to the grebes
   - diver
    
3. A person with confused ideas; incapable of serious thought
   - addle-head, addlehead, birdbrain

Sounds like: lune

Derived forms: loons

See also: loony

Type of: bum [N. Amer], do-nothing, gaviiform seabird, idler, layabout, loafer, misfit

Part of: Gavia, genus Gavia

Encyclopedia: Loon Loon, Bohol