Definition of tack verb from the Oxford Advanced American Dictionary

     

    tack

     verb
    verb
    NAmE//tæk//
     
    Verb Forms present simple I / you / we / they tack
     
    he / she / it tacks
     
    past simple tacked
     
    -ing form tacking
     
     
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  1. 1 [transitive] tack something + adv./prep. to fasten something in place with a tack or tacks synonym nail He tacked a notice on the bulletin board.
  2. 2 [intransitive] (technology) to change the direction of a sailing boat so that the wind blows onto the sails from the opposite side; to do this several times in order to travel in the direction that the wind is coming from
  3. 3 [transitive] tack something (+ adv./prep.) to fasten pieces of cloth together temporarily with long loose stitches before sewing them finally She tacked the sleeve of the blouse into the armhole.
  4. Phrasal Verbstack somethingon
See the Oxford Advanced Learner's Dictionary entry: tack