#1 double n. [two-base hit, two-bagger, two-baser] a base hit on which the batter stops safely at second base; "he hit a double to deep centerfield". wn
#2 double v. [duplicate] increase twofold; "The population doubled within 50 years". wn
#3 double s. [dual, twofold, two-fold, treble, threefold, three-fold] 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"-Frederic. wn
#4 double s. [dual, duple] 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 me. wn
#5 double s. [doubled, twofold, two-fold] twice as great or many; "ate a double portion"; "the dose is doubled"; "a twofold increase". wn
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