couple

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun Two items of the same kind; a pair.
• noun Something that joins or connects two things together; a link.
• noun Two people united, as by betrothal or marriage.
• noun Two people together.
• noun Informal A few; several.
• noun Physics A pair of forces of equal magnitude acting in parallel but opposite directions, capable of causing rotation but not translation.
• intransitive verb To link together; connect.
• intransitive verb Electricity To link (two circuits or currents), as by magnetic induction.
• intransitive verb Archaic To join together in marriage; marry.
• intransitive verb To form pairs; join.
• intransitive verb To unite sexually; have sexual intercourse.
• intransitive verb To join chemically.
• adjective Two or few.

from The Century Dictionary.

• noun In astronomy, a double star.
• 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.
• noun Two of the same class or kind connected or considered together; a brace: as, a couple of oranges; “a couple of shepherds,”
• noun 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.
• noun A pair of forces, equal, parallel, and acting in opposite directions: they tend to make the body acted upon rotate.
• noun 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.
• noun plural In carpentry, rafters framed together in pairs by means of a tie at or near their lower ends.
• noun plural Association by twos; junction of two.

from the GNU version of the Collaborative International Dictionary of English.

• transitive verb To link or tie, as one thing to another; to connect or fasten together; to join.
• transitive verb colloq. To join in wedlock; to marry.
• intransitive verb obsolete To come together as male and female; to copulate.
• noun obsolete That which joins or links two things together; a bond or tie; a coupler.
• noun Two of the same kind connected or considered together; a pair; a brace.
• noun A male and female associated together; esp., a man and woman who are married or betrothed.
• noun (Arch.) See Couple-close.
• noun (Elec.) One of the pairs of plates of two metals which compose a voltaic battery; -- called a voltaic couple or galvanic couple.
• noun (Mech.) Two rotations, movements, etc., which are equal in amount but opposite in direction, and acting along parallel lines or around parallel axes.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun Two partners in a romantic or sexual relationship.
• noun Two of the same kind connected or considered together.
• noun informal A small number.
• noun One of the pairs of plates of two metals which compose a voltaic battery, called a voltaic couple or galvanic couple.
• noun physics Two forces that are equal in magnitude but opposite in direction (and acting along parallel lines), thus creating the turning effect of a torque or moment.
• determiner informal A small number of.
• verb transitive To join (two things) together, or (one thing) to (another).
• verb transitive, dated To join in wedlock; to marry.
• verb intransitive To join in sexual intercourse; to copulate.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• verb link together
• verb bring two objects, ideas, or people together
• noun a pair who associate with one another
• noun a small indefinite number
• noun two items of the same kind
• verb engage in sexual intercourse