firstborn

adjective

first·​born ˈfərs(t)-ˈbȯrn 

: first brought forth : eldest

firstborn noun

Examples of firstborn in a Sentence

Recent Examples on the Web

Reese Witherspoon’s Son Deacon Phillippe While Reese Witherspoon is just about the same height as daughter Ava, her firstborn, son Deacon, has long surpassed her in height. — Stephanie Sengwe, PEOPLE, 30 Oct. 2026

In 1985, Lee’s firstborn, then a preschooler, died in a traffic accident. — E. Tammy Kim, New Yorker, 12 Oct. 2026

Those moments with their firstborn will be forever cherished. — Briseida Holguin, CBS News, 7 Oct. 2026

Nevada Alexander Musk’s firstborn son died at just 10 weeks old from Sudden Infant Death Syndrome in 2002. — Emma Banks, InStyle, 29 Sep. 2026

Word History

First Known Use

14th century, in the meaning defined above

Rhymes for firstborn

• adorn
• airborne
• blackthorn
• broomcorn
• buckhorn
• buckthorn
• careworn
• foodborne
• forborne
• forewarn
• forlorn
• forsworn

Kids Definition

firstborn

adjective

first·​born ˈfərs(t)-ˈbȯ(ə)rn 

: born first : eldest

firstborn noun