leftEnglishOxford American Thesaurusleft adjective my left arm: left-hand, sinistral, at nine o'clock; Nautical port; Nautical, archaic larboard; Heraldry sinister. ▷antonyms right; starboard; dexter.word linksleftsinistral relating to the leftlevo- related prefix, as in levorotatorysinistro- related prefix, as in sinistrorse