- 1[transitive] tack something + adv./prep. to fasten something in place with a tack or tacks synonym nail The carpet was tacked to the floor.
- 2[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.
- 3[intransitive] (specialist) 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 Word Originverb Middle English (in the general sense ‘something that fastens one thing to another’): probably related to Old French tache
BrE BrE//tæk//; NAmE NAmE//tæk//Verb Forms present simple I / you / we / they tack
BrE BrE//tæk//; NAmE NAmE//tæk//he / she / it tacks
BrE BrE//tæks//; NAmE NAmE//tæks//past simple tacked
BrE BrE//tækt//; NAmE NAmE//tækt//past participle tacked
BrE BrE//tækt//; NAmE NAmE//tækt//-ing form tacking
BrE BrE//ˈtækɪŋ//; NAmE NAmE//ˈtækɪŋ//