[doo-uh l, dyoo-]
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.
Origin of dual
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Related Words for dualerbinary, double, duplex, duplicate, twin, bifold, binal, coupled, doubleheader, duple
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
- the dual number
- a dual form of a word
verb duals, dualling or dualled
(tr) British to make (a road) into a dual carriageway
Word Origin for dual
C17: from Latin duālis concerning two, from duo two
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
c.1600, from Latin dualis, from duo "two" (see two). Related: Dually.
Online Etymology Dictionary, © 2010 Douglas Harper