TACK Meaning of TACK in English I . v. a. 1.Fasten ( slightly ), attach, append, affix, tag.2.Nail ( with ~s ).3.( Naut. ) Put about, change the course of. II . v. n. ( Naut. ) Go about, ~ ship. III . n. Small nail. Soule. Dictionary of English synonyms. Словарь английских синонимов. 2012