1 : a cord (or string or ribbon or wire etc.) with which something is tied; "he needed a tie for the packages"
2 : a horizontal beam used to prevent two other structural members from spreading apart or separating; "he nailed the rafters together with a tie beam"
3 : neckwear consisting of a long narrow piece of material worn (mostly by men) under a collar and tied in knot at the front
4 : the finish of a contest in which the score is tied and the winner is undecided
verbe
1 : connect, fasten, or put together two or more pieces
2 : connect, fasten, or put together two or more pieces