tack2 verb 1 [transitiveT always + adverbadv/prepositionprep]FASTEN/DO UP to attach something to a wall, board etc, using a tack 〔用图钉〕把…钉上tack something to something A handwritten note was tacked to the wall. 一张手写便条钉在墙上。
2. [intransitiveI]TTW to change the course of a sailing ship so that the wind blows against its sails from the opposite direction 〔帆船〕抢风航行 3. [transitiveT]DCDLH to fasten pieces of cloth together with long loose stitches, before sewing them 〔大针脚〕暂缝,粗缝
4 tack something ↔ on phrasal verbphr v ADDto add something new to something that is already complete, especially in a way that looks wrong or spoils the original thing 〔尤指画蛇添足地〕增补,附加 a beautiful old house with a hideous modern extension tacked on at the back 后面加建了一个丑陋的现代建筑物的漂亮老房子