[ furst-bawrn ]
See synonyms for: firstborns on

  1. first in the order of birth; eldest.

  1. a firstborn child.

  2. a first result or product.

Origin of firstborn

Middle English word dating back to 1300–50; see origin at first, born Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use firstborn in a sentence

  • The mother said that she could not distinguish them, and that she did not know which was the first-born.

    Xerxes | Jacob Abbott
  • Then, "when I see the—blood—on the—lintel—and on the two—side-posts—I will not go in and—kill the first-born!"

    The Sabbath-School Index | Richard Gay Pardee

British Dictionary definitions for first-born


  1. eldest of the children in a family

  1. the eldest child in a family

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012