1. (noun)budgerigar, budgereegah, budgerygah, budgie, grass parakeet, lovebird, shell parakeet, Melopsittacus undulatus small Australian parakeet usually light green with black and yellow markings in the wild but bred in many colors Synonyms: budgereegah, budgie, lovebird, budgerigar, shell parakeet, budgerygah, grass parakeet