American Heritage® Dictionary of the English Language, Fourth Edition
- adj. Composed of two usually like or complementary parts; double: dual controls for pilot and copilot; a car with dual exhaust pipes.
- adj. Having a double character or purpose: a belief in the dual nature of reality.
- adj. Grammar Of, relating to, or being a number category that indicates two persons or things, as in Greek, Sanskrit, and Old English.
- n. Grammar The dual number.
- n. Grammar An inflected form of noun, adjective, pronoun, or verb used with two items or people.
Century Dictionary and Cyclopedia
- Relating to two; specifically, in grammar, expressing two, as distinguished from singular, expressing one, and from plural, expressing more than two. The languages of our family originally had a dual number, both in declension and in conjugation; it is preserved in Sanskrit and Greek, and less fully in other tongues, as Gothic. Dual forms also occur in other families.
- Composed or consisting of two parts, qualities, or natures, which may be separately considered; twofold; binary; dualistic: as, the dual nature of man, spiritual and corporeal.
- n. In grammar, the number relating to two; the dual number.
- In geometry, given by a principle of duality, as by interchanging point and straight in a plane.
- n. In geometry, a figure or theorem obtained by a principle of duality, as by interchanging side and angle in a plane.
- n. In chess, a problem which has two solutions, that is, one in which the mate can be given either by one or by two pieces, or by one piece on two or more different squares.
- adj. Characterized by having two (usually equivalent) components.
- adj. Double.
- adj. grammar Pertaining to grammatical number (as in singular and plural), referring to two of something, such as a pair of shoes, in the context of the singular, plural and in some languages, trial grammatical number. Modern Arabic displays a dual number, as did Homeric Greek.
- n. Of an item that is one of a pair, the other item in the pair.
- n. geometry Of a regular polyhedron with V vertices and F faces, the regular polyhedron having F vertices and V faces.
- n. grammar dual number The grammatical number of a noun marking two of something (as in singular, dual, plural), sometimes referring to two of anything (a couple of, exactly two of), or a chirality-marked pair (as in left and right, as with gloves or shoes) or in some languages as a discourse marker, "between you and me". A few languages display trial number.
- n. mathematics Of a vector in an inner product space, the linear functional corresponding to taking the inner product with that vector. The set of all duals is a vector space called the dual space.
GNU Webster's 1913
- adj. Expressing, or consisting of, the number two; belonging to two; , in Greek.
- adj. having more than one decidedly dissimilar aspects or qualities
- adj. consisting of or involving two parts or components usually in pairs
- adj. a grammatical number category referring to two items or units as opposed to one item (singular) or more than two items (plural)
- Latin dualis ("two"), from duo ("two"), + adjective suffix -alis (Wiktionary)
- Latin duālis, from duo, two; see dwo- in Indo-European roots. (American Heritage® Dictionary of the English Language, Fourth Edition)
“Yet he wrote a good deal about empire and coined the term "dual mandate" to describe British policy.”
“For two years he barely mentioned it, but today he actually used the phrase "dual mandate" - twice!”
“UNIDENTIFIED FEMALE: She ` d be eligible for what we call dual jurisdiction.”
“For peer-reviewed articles, it requires deposit upon publication, before the embargo runs, supporting what I call the dual deposit/release strategy or what Stevan Harnad calls immediate deposit / optional access.”
“This psychiatrist entered into what we call a dual relationship by traveling with Anna Nicole, mingling with her friends.”
“So Intel and rival Advanced Micro Devices Inc. began competing by squeezing two or four electronic brains on their products, offering what they call dual-core or quad-core microprocessors.”
“So these animals actually have what we call a dual jaw joint of two pairs of bones that are actually articulating next to each other on the upper and lower sides of the skull.”
“They're also looking right now for what they call dual phenomenology.”
“One possible option, which he calls dual key, is the ability for the NID and the Pentagon to jointly develop the budget.”
“Most had what they call dual diagnosis—mental health problems plus drug and alcohol abuse to dull the pain.”
These user-created lists contain the word ‘dual’.
Similar words meaning different things
Words That Make Sense in Reverse Too! Bad news for a dyslexic, 'cause s/he's got no clue if s/he read the word correctly or not, as opposed to a palindrome (i.e., no mistake possible, cf. "Dyslexic...
T9 predictive text input words which should come second.
Looking for tweets for dual.