n. Two of the same class or kind connected or considered together; a brace: as, a couple of oranges; “a couple of shepherds,”n. Specifically A man and woman associated together, whether by marriage or by betrothal, or accompanying each other on a given occasion, as at a party: as, a loving couple; a young couple.n. A pair of forces, equal, parallel, and acting in opposite directions: they tend to make the body acted upon rotate.n. In electricity, a pair of metallic plates in contact, used as a source of an electrical current, as in one of the cells of a voltaic battery (a voltaic couple), or in a thermo-electric battery (a thermo-electric couple). See electricity and thermo-electricity.n. plural In carpentry, rafters framed together in pairs by means of a tie at or near their lower ends.n. plural Association by twos; junction of two.To link or connect, as one thing with another; fasten together, especially in a pair or pairs; unite: as, to couple cars.To marry; join together as husband and wife; unite in matrimony.In organ-playing, to connect by means of a coupler, as two keys or keyboards. See coupler .To embrace, as the sexes; copulate.In organ-playing, to be susceptible of connection by means of a coupler, as one key or keyboard with another.n. In astronomy, a double star.