A small, predominantly green parrot with grey throat and underparts, Myiopsitta monachus, which is native to South America, has been widely kept elsewhere as a pet, and is naturalized in parts of North America.
Origin
1920s.
Definition of monk parakeet in US English:
monk parakeet
noun
A small, predominantly green parrot with grey throat and underparts, Myiopsitta monachus, which is native to South America, has been widely kept elsewhere as a pet, and is naturalized in parts of North America.