Pronunciation: (dOO'ul, dyOO'-),[key] —adj. 1. of, pertaining to, or noting two.
2. composed or consisting of two people, items, parts, etc., together; twofold; double: dual ownership; dual controls on a plane. 3. having a twofold, or double, character or nature.
4. Gram.being or pertaining to a member of the category of number, as in Old English, Old Russian, or Arabic, that denotes two of the things in question.
—n.Gram. 1. the dual number.
2. a form in the dual, as Old English git “you two,” as contrasted with ge “you” referring to three or more.