1. (adj)morganatic, left-handed (of marriages) of a marriage between one of royal or noble birth and one of lower rank; valid but with the understanding that the rank of the inferior remains unchanged and offspring do not succeed to titles or property of the superior Synonyms: left-handed, bumbling, levorotatory, butterfingered, handless, heavy-handed, morganatic, levorotary, ham-handed, ham-fisted, bungling Antonyms: illegitimate