Definition of galah
: an Australian cockatoo (Eolophus roseicapillus synonym Cacatua roseicapilla) that has the back, wings, and tail gray and the head and underparts various shades of rosy pink, that sometimes is a pest in wheat-growing areas, and that is often kept as a cage bird
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Merriam-Webster unabridged
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Time Traveler for galah
The first known use of galah was in 1862
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