tack

(noun) the heading or position of a vessel relative to the trim of its sails.

(noun) a short nail with a sharp point and a large head.

(noun) gear for a horse. Synonyms: stable gear, saddlery.

(noun) (nautical) a line (rope or chain) that regulates the angle at which a sail is set in relation to the wind. Synonyms: sheet, mainsheet, weather sheet, shroud.

(noun) (nautical) the act of changing tack. Synonyms: tacking.

(noun) sailing a zigzag course.

(verb) fasten with tacks. Examples: "Tack the notice on the board."

(verb) turn into the wind. Synonyms: wear round. Examples: "The sailors decided to tack the boat." "The boat tacked."

(verb) create by putting components or members together. Synonyms: assemble, piece, put together, set up, tack together. Examples: "She pieced a quilt." "He tacked together some verses." "They set up a committee."

(verb) sew together loosely, with large stitches. Synonyms: baste. Examples: "Baste a hem."

(verb) fix to; attach. Synonyms: append, tag on, tack on, hang on. Examples: "Append a charm to the necklace."

(verb) reverse (a direction, attitude, or course of action). Synonyms: interchange, switch, alternate, flip, flip-flop.