The Collaborative International Dictionary of English v.0.48:

Hoot \Hoot\ (h[=oo]t), v. i. [imp. & p. p. Hooted; p. pr. &
   vb. n. Hooting.] [OE. hoten, houten, huten; cf. OSw. huta,
   Sw. huta ut to take one up sharply, fr. Sw. hut interj.,
   begone! cf. also W. hwt off! off with it! away! hoot!]
   1. To cry out or shout in contempt.
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            Matrons and girls shall hoot at thee no more.
                                                  --Dryden.
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   2. To make the peculiar cry of an owl.
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            The clamorous owl that nightly hoots. --Shak.
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