noun

1. anything joining two things together; bond; link
2. two things or persons of the same sort that are somehow associated
3. two people, esp. a man and woman, who are engaged, married, or joined as partners, as in a dance or game
4. Informal an indefinite small number; a few [a couple of ideas]: now often used with adjectival force, omitting the of a couple cups of coffee
5. Elec. two dissimilar metals or alloys placed in electrical contact with each other to create a galvanic or thermoelectric current; voltaic couple
6. Mech. two equal forces producing rotation by moving in parallel but opposite directions

Etymology: ME < OFr cople < L copula, a band, link: see copula

transitive verb coupled -·pled, coupling -·pling

1. to join together by fastening or by association; link; connect
2. Archaic to join in marriage
3. Elec. to join (two or more circuits) by a common magnetic or electric field or by direct connection

Etymology: ME couplen < OFr copler < L copulare < copula

intransitive verb

1. to come together; unite
2. to unite in sexual intercourse; copulate