American Heritage Dictionary
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Century Dictionary
GNU Webster's 1913
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WordNet
(1)
Elsewhere on the web
She's not a "birdbrain," she said, but she is picking up the habit.
What Steyn found interesting is that the people who prevented another terrorist attack on the United States after 9-11 are under threat of investigation, while "birdbrain" Janet Napolitano is in charge of Homeland Security.— Media Matters for America - Limbaugh Wire

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