'Dual' definitions:

Definition of 'dual'

From: WordNet
adjective
Consisting of or involving two parts or components usually in pairs; "an egg with a double yolk"; "a double (binary) star"; "double doors"; "dual controls for pilot and copilot"; "duple (or double) time consists of two (or a multiple of two) beats to a measure" [syn: double, dual, duple]
adjective
Having more than one decidedly dissimilar aspects or qualities; "a double (or dual) role for an actor"; "the office of a clergyman is twofold; public preaching and private influence"- R.W.Emerson; "every episode has its double and treble meaning"-Frederick Harrison [syn: double, dual, twofold, two-fold, treble, threefold, three- fold]
adjective
A grammatical number category referring to two items or units as opposed to one item (singular) or more than two items (plural); "ancient Greek had the dual form but it has merged with the plural form in modern Greek"

Definition of 'Dual'

From: GCIDE
  • Dual \Du"al\, a. [L. dualis, fr. duo two. See Two.] Expressing, or consisting of, the number two; belonging to two; as, the dual number of nouns, etc., in Greek. [1913 Webster]
  • Here you have one half of our dual truth. --Tyndall. [1913 Webster]