- superlative of old.
eldest
Americanadjective
adjective
Etymology
Origin of eldest
First recorded before 900; Middle English; Old English eldesta, superlative of eald, ald; see old
Explanation
Someone who's described as eldest in their family was born first. Your eldest sister is the oldest one. Use the adjective eldest when you're describing people in terms of birth order: the oldest is the eldest. Your eldest friend is older than your other friends. You can also use the word as a noun, meaning "firstborn." Your mom might introduce you by saying, "This is my eldest." It's a somewhat formal, old fashioned word, much less popular today than "oldest."
Vocabulary lists containing eldest
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
The volunteer found Arlene’s eldest daughter, Dayna Zoller, now a dentist in New Jersey.
From The Wall Street Journal ● Sep. 10, 2026
Elsesser’s first life-altering experience came when he was 5 and witnessed his father grappling with the tragedy of losing his eldest son.
From Los Angeles Times ● Sep. 7, 2026
Everything is intended to go to my eldest grandson, who is unable to manage his finances because of severe mental illness.
From MarketWatch ● Sep. 2, 2026
Brian Conley said winning the series was "amazing", but wished his eldest daughter Amy and wife Anne-Marie could have also been there to experience it with them.
From BBC ● Aug. 28, 2026
They were now the property of the eldest son by Leon’s second marriage and installed in a castle somewhere in the Scottish Highlands.
From "Atonement" by Ian McEwan
![]()
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.