'Thunderbird' definitions:
Definition of 'thunderbird'
(from WordNet)
noun
(mythology) the spirit of thunder and lightning believed by some Native Americans to take the shape of a great bird
Definition of 'Thunderbird'
From: GCIDE
- Thunderbird \Thun"der*bird`\, n. (Zool.) An Australian insectivorous singing bird ({Pachycephala gutturalis}). The male is conspicuously marked with black and yellow, and has a black crescent on the breast. Called also white-throated thickhead, orange-breasted thrust, black-crowned thrush, guttural thrush, and black-breasted flycatcher. [1913 Webster]