The American Heritage® Dictionary of the English Language, 4th Edition
n. A parakeet (Melopsittacus undulatus) native to Australia and having green, yellow, or blue plumage. It is a popular cage bird bred in a variety of colors not found in wild populations. Also called shell parakeet.
n. A small species of parakeet native to Australia and often kept as pets, Melopsittacus undulatus.
the GNU version of the Collaborative International Dictionary of English
n. small Australian parakeet (Melopsittacus undulatus) usually light green with black and yellow markings in the wild but bred in many colors.
The Century Dictionary and Cyclopedia
n. An Australian name of the grass-parrakeet, Melopsittacus undulatus.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. small Australian parakeet usually light green with black and yellow markings in the wild but bred in many colors
Word Usage
"In the living room of his London home, film-maker Jamie Thraves is attempting to return to its cage a china-blue budgerigar named Sparky, which has taken up residence on the frame of a mirror."