Moo definitions

mo͝o
To emit the deep, bellowing sound made by a cow; low.
verb
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The lowing of a cow or a similar sound.
noun
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An object-oriented MUD.
noun
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The characteristic vocal sound made by a cow; lowing sound.
noun
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To make this sound; low.
verb
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(MultiUser Dimension Object-Oriented Technology) Same as MUD.
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Acronym for MUD, Object-oriented.
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(onomatopoeia) The characteristic sound made by a cow or bull.
noun
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(UK, slang, mildly derogatory) A foolish woman.

You silly moo! What did you do that for?

noun
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(intransitive) Of a cow or bull, to make its characteristic lowing sound.
verb
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The characteristic sound made by a cow or bull.
interjection
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Origin of moo

M(UD) o(bject) o(riented)