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First in order of birth; born first.
The child in a family who is born first.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.



1. first in the order of birth; eldest.
2. a firstborn child.
3. a first result or product.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.firstborn - the offspring who came first in the order of birth
offspring, progeny, issue - the immediate descendants of a person; "she was the mother of many offspring"; "he died without issue"
Adj.1.firstborn - first in order of birth; "the firstborn child"
first - preceding all others in time or space or degree; "the first house on the right"; "the first day of spring"; "his first political race"; "her first baby"; "the first time"; "the first meetings of the new party"; "the first phase of his training"
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.


n. primogénito-a.
English-Spanish Medical Dictionary © Farlex 2012
References in classic literature ?
Her mother heart ached, bereft of its firstborn. Her mind was in an anguish of hopes and fears.
"It is the voice of my firstborn, calling aloud for justice!
To you little Gazan might have seemed a hideous and repulsive creature, but to Taug and Teeka he was as beautiful and as cute as is your little Mary or Johnnie or Elizabeth Ann to you, and he was their firstborn, their only balu, and a he--three things which might make a young ape the apple of any fond father's eye.
The sole Pentateuchal example in which the redemption occurred, as mentioned above, involved payment of the redemption for a limited number of firstborns not redeemed by Levites, via Moses and thus not in the Sanctuary.
The trend was most evident among women in their teens or in their early 20s, and one in every four firstborns in 2000 was likely to have been born to parents who had what are known as ''dekichatta kon'' marriages in Japanese.
As predicted, pre-competition state-anxiety was higher in individual competition than team competition, Wilks' Lambda = .88, F (2, 131) = 9.37, p < .001 and was higher for firstborns than laterborns, Wilks' Lambda .76, F (2, 131) = 21.27, p <.001.
He speculated that fetuses receive fewer chemicals from their mothers if they have older siblings who were breast-fed, and that firstborns and children with older siblings raised on infant formula are more likely to be contaminated with endocrine disrupters.
For example, he reports that laterborns were 4.6 times more likely than firstborns to support Darwin and 3.6 times more likely to support Einstein on special relativity - but only 1.3 times more likely to support Einstein on general relativity.
He was a second-born son, and second-born children are usually not as assertive as firstborns, who tend to model themselves on their parents.
Carlson and Kangun (1988) specifically suggest that differential socialization results in overt personality and behavior trait differences between firstborns and later-borns.
The mean age of firstborns in the sample was 14.3, while the mean age for secondborn siblings was 11.8.
Washington, Nov 25 (ANI): A new study examines whether firstborns really have advantages over their younger siblings.