late 14c., conneccion, "state or fact of being connected," also connexioun (in this spelling from mid-15c.), from Old French connexion, from Latin connexionem (nominative connexio) "a binding or joining together," from *connexare, frequentative of conectere "to fasten together, to tie, join together," from assimilated form of com "together" (see con-) + nectere "to bind, tie" (from PIE root *ned- "to bind, tie").
Meaning "act of connecting" is from c. 1600; sense of "anything that connects" is from 1741. As "circle of persons with whom one is brought into more or less intimate relations" is from 1767. Meaning "the meeting of one means of travel with another" is from 1862. Sense of "supplier of narcotics" is attested by 1934.
1610s, "that which is added;" 1620s, "union" (now obsolete); 1630s, "action of adding to the end or adding a smaller to a greater," from Medieval Latin annexiationem (nominative annexatio) "action of annexing," noun of action from past-participle stem of annexare "to bind to," from ad "to" (see ad-) + nectere "to tie, bind" (from PIE root *ned- "to bind, tie"). The Middle English noun form was annexion "union; joining; territory acquired" (mid-15c.).
"uniting, serving to couple," late 14c., from Late Latin copulativus, from copulat-, past-participle stem of Latin copulare "to join together, link, unite," from copula "a band, tie, link" (see copulate). Related: Copulatively.
"to tie or bind," as with rope or cord, 1620s, originally nautical, from French lachier, from Old French lacier "to lace on, fasten with laces; entrap, ensnare" (see lace (v.)). Related: Lashed; lashing.
1660s, "bond, link, interdependence between members of a series or group; means of communication," from Latin nexus "that which ties or binds together," past participle of nectere "to bind," from PIE root *ned- "to bind, tie."
East Indies log raft, 1670s, from Hindi or Malayalam, from Tamil (Dravidian) kattu-maram "tied wood," from kattu "tie, binding" + maram "wood, tree." It also was used in the West Indies and South America.