[doo-uh l, dyoo-] /ˈdu əl, ˈdyu-/
of, relating to, or noting two.
composed or consisting of two people, items, parts, etc., together; twofold; double:
dual ownership; dual controls on a plane.
having a twofold, or double, character or nature.
Grammar. 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.
the dual number.
a form in the dual, as Old English git “you two,” as contrasted with ge “you” referring to three or more.
relating to or denoting two
(in the grammar of Old English, Ancient Greek, and certain other languages) denoting a form of a word indicating that exactly two referents are being referred to
(maths, logic) (of structures or expressions) having the property that the interchange of certain pairs of terms, and usually the distribution of negation, yields equivalent structures or expressions
verb duals, dualling, dualled
(transitive) (Brit) to make (a road) into a dual carriageway
c.1600, from Latin dualis, from duo “two” (see two). Related: Dually.
A pair of wheels and tires mounted as a unit on a truck or semitrailer axle (1970s+ Truckers)
- Dual sensory impairment
noun 1. the condition of being affected by sight and hearing loss
noun, Mathematics. 1. the set of all linear functionals whose domain is a given vector space.
networking A term used to describe a network node running both IPv4 and IPv6 protocol stacks (or possibly others) at the same time. Such a machine can act as a protocol converter between the two networks. (2000-12-19)
- Dual tone multi frequency
communications (DTMF, or “touch-tone”) A method used by the telephone system to communicate the keys pressed when dialling. Pressing a key on the phone’s keypad generates two simultaneous tones, one for the row and one for the column. These are decoded by the exchange to determine which key was pressed. (1995-03-28)