- The definition of dual is something that has to do with two or two parts.
- An example of something dual is an electric toothbrush that both rotates and moves from side-to-side while it brushes your teeth; dual movement.
- An example of something dual is a plan of attack that has two parts; dual plan of attack.
dual definition by Webster's New World
- of two
- having or composed of two parts or kinds, like or unlike; double; twofold: a dual nature
Origin: Classical Latin dualis ; from duo, two
- dual number
- a word having dual number
dual definition by American Heritage Dictionary
- Composed of two usually like or complementary parts; double: dual controls for pilot and copilot; a car with dual exhaust pipes.
- Having a double character or purpose: a belief in the dual nature of reality.
- Grammar Of, relating to, or being a number category that indicates two persons or things, as in Greek, Sanskrit, and Old English.
- The dual number.
- An inflected form of a noun, adjective, pronoun, or verb used with two items or people.
Origin: Latin duālis, from duo, two; see dwo- in Indo-European roots.
- duˈal·ly adverb