Breadcrumb Home > Thesaurus > E Synonyms of eldest Find synonyms for: Noun 1. firstborn, eldest, offspring, progeny, issue usage: the offspring who came first in the order of birth Adjective 1. firstborn, eldest, first (vs. last) usage: first in order of birth; "the firstborn child" WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of eldest (Dictionary) TrendingHere are the facts and trivia that people are buzzing about. Hanukkah Origins of the Christmas Holiday Jewish Holidays, 2010-2030 (A.M. 5770-5791) Western Christian Holidays, 2010-2030 Krampus: The Christmas Devil Kwanzaa ✖ Related Content Daily Word Quiz: anomie Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language