Nephew by Cynthia Long | Jan 18, 2016 Share This Tweet Share Merriam-Webster Online Dictionarynephew (noun)1.a) a son of one's brother or sister or of one's brother-in-law or sister-in-lawb) an illegitimate son of an ecclesiastic2.obsolete a lineal descendant , especially - grandsonRelated Articles: AWOD 2064: Nephew