- A sorry fellow; a worthless person; a rogue. - Any one of several aquatic, wed-footed, northern birds of the
genus Urinator (formerly Colymbus), noted for their expertness in
diving and swimming under water. The common loon, or great northern
diver (Urinator imber, or Colymbus torquatus), and the red-throated
loon or diver (U. septentrionalis), are the best known species. See
Diver.