Swift.
Dou"ble, v. t. [imp. & p. p. Doubled (?); p. pr. & vb. n. Doubling (?).] [OE. doblen, dublen, doublen, F. doubler, fr. L. duplare, fr. duplus. See Double, a.] 1. To increase by adding an equal number, quantity, length, value, or the like; multiply by two; as, to double a sum of money; to double a number, or length.
Double six thousand, and then treble that.
Shak.
2. To make of two thicknesses or folds by turning or bending together in the middle; to fold one part upon another part of; as, to double the leaf of a book, and the like; to clinch, as the fist; -- often followed by up; as, to double up a sheet of paper or cloth. Prior.
Then the old man
Was wroth, and doubled up his hands.
Tennyson.
3. To be the double of; to exceed by twofold; to contain or be worth twice as much as.
Thus reënforced, against the adverse fleet,
Still doubling ours, brave Rupert leads the way.
Dryden.
4. To pass around or by; to march or sail round, so as to reverse the direction of motion.
Sailing along the coast, the doubled the promontory of Carthage.
Knolles.