noun. ['ˈtɝːnz'] small slender gull having narrow wings and a forked tail.
1. Noun, singular or mass The roseate tern can go all the way under the water’s surface after a long dive and pursue a fish by using its wings to propel it through the water. 2. Adjective The endangered California least tern (Sterna antillarum browni) has a momentarily stable population of approximately 7,500 birds.