01 n. That which joins or links two things together; a bond or tie; a coupler.
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1.
That which joins or links two things together; a bond or tie; a coupler.[Obs.]“It is in some sort with friends as it is with dogs in couples; they should be of the same size and humor.” — L'Estrange.“I'll go in couples with her.” — Shak.
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2.
Two of the same kind connected or considered together; a pair; a brace.“Adding one to one we have the complex idea of a couple.” — Locke.“[Ziba] met him with a couple of asses saddled.” — 2 Sam. xvi. 1.
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3.
A male and female associated together; esp., a man and woman who are married or betrothed.“Such were our couple, man and wife.” — Lloyd.“Fair couple linked in happy, nuptial league.” — Milton.
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5.
One of the pairs of plates of two metals which compose a voltaic battery; -- called a voltaic couple or galvanic couple.(Elec.) Also: voltaic couple, galvanic couple
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6.
Two rotations, movements, etc., which are equal in amount but opposite in direction, and acting along parallel lines or around parallel axes.(Mech.)