What is the meaning of flightless bird?

noun

  • Flightless birds having flat breastbones lacking a keel for attachment of flight muscles: ostriches; cassowaries; emus; moas; rheas; kiwis; elephant birds.
WordNet 3.0 © 2006 by Princeton University
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APAWordNet. (2010). flightless bird. Retrieved September 20, 2026, from http://smartdefine.org/flightless_bird/definitions/1276552
ChicagoWordNet. 2010. "flightless bird" http://smartdefine.org/flightless_bird/definitions/1276552 (accessed September 20, 2026).
HarvardWordNet 2010, flightless bird, Smart Define, viewed 20 September, 2026, <http://smartdefine.org/flightless_bird/definitions/1276552>.
MLAWordNet. "flightless bird" 23 October 2010. Web. 20 September 2026. <http://smartdefine.org/flightless_bird/definitions/1276552>