Any of various small owls of the genus Otus, especially O. asio, of North America, having ear tufts and a quavering whistlelike call.(noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.