Definition of 'tack'

Noun

1. the heading or position of a vessel relative to the trim of its sails
2. a short nail with a sharp point and a large head
3. gear for a horse
      Synonyms: stable gear saddlery
4. (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
5. (nautical) the act of changing tack
      Synonyms: tacking
6. sailing a zigzag course

Verb

1. fasten with tacks; "tack the notice on the board"
2. turn into the wind; "The sailors decided to tack the boat"; "The boat tacked"
      Synonyms: wear round
3. create by putting components or members together; "She pieced a quilt"; "He tacked together some verses"; "They set up a committee"
      Synonyms: assemble piece put together set up tack together
      Antonyms: disassemble dismantle take apart break up break apart
4. sew together loosely, with large stitches; "baste a hem"
      Synonyms: baste
5. fix to; attach; "append a charm to the necklace"
      Synonyms: append tag on tack on hang on
6. reverse (a direction, attitude, or course of action)
      Synonyms: interchange switch alternate flip flip-flop

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