mainsheet mainsail • mainspring · · · Info · Definitions · Synonyms · Characters · · mainsheet · · Text Latin · · Script 9 · · Length Definitions · · · (noun) (nautical) a line (rope or chain) that regulates the angle at which a sail is set in relation to the wind. Synonyms: sheet, tack, weather sheet, shroud. · · Noun Definition 1 Synonyms · · · sheet · · Synonym 1 tack · · Synonym 2 weather sheet · · Synonym 3 shroud · · Synonym 4 Characters · · a latin small letter a U+0061 e latin small letter e U+0065 h latin small letter h U+0068 i latin small letter i U+0069 m latin small letter m U+006D n latin small letter n U+006E s latin small letter s U+0073 t latin small letter t U+0074