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1. (Animals) any of various South American hummingbirds of the genera Chalcostigma, Ramphomicron, etc, having a thornlike bill
2. (Animals) Also called: thornbill warbler any of various Australasian wrens of the genus Acanthiza and related genera: family Muscicapidae
3. (Animals) any of various other birds with thornlike bills
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|Noun||1.||thornbill - any of various South American hummingbirds with a sharp pointed bill|
hummingbird - tiny American bird having brilliant iridescent plumage and long slender bills; wings are specialized for vibrating flight