definition of
double

[1] #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] #2 double v. [duplicate] increase twofold; "The population doubled within 50 years". wn

[3] #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] #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] #5 double s. [doubled, twofold, two-fold] twice as great or many; "ate a double portion"; "the dose is doubled"; "a twofold increase". wn