founder
1 Americannoun
verb (used without object)
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(of a ship, boat, etc.) to fill with water and sink.
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to fall or sink down, as buildings, ground, etc..
Built on a former lake bed, the building has foundered nearly ten feet.
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to become wrecked; fail utterly.
The project foundered because public support was lacking.
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to stumble, break down, or go lame, as a horse.
His mount foundered on the rocky path.
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to become ill from overeating.
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Veterinary Pathology. (of a horse) to suffer from laminitis.
verb (used with object)
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to cause to fill with water and sink.
Rough seas had foundered the ship in mid-ocean.
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Veterinary Pathology. to cause (a horse) to break down, go lame, or suffer from laminitis.
noun
noun
verb
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(of a ship) to sink
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to break down or fail
the project foundered
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to sink into or become stuck in soft ground
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to fall in or give way; collapse
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(of a horse) to stumble or go lame
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archaic (of animals, esp livestock) to become ill from overeating
noun
noun
noun
Usage
Founder is sometimes wrongly used where flounder is meant: this unexpected turn of events left him floundering (not foundering )
Other Word Forms
- unfoundered adjective
- unfoundering adjective
Etymology
Origin of founder1
First recorded in 1275–1325; Middle English found(o)ur, foundere, fundre “original builder of a city, church, castle, or city; founder of a country,” from Anglo-French fundur, from Old French fondeor, from Latin fundātōr-, stem of fundātor; found 1; -er 1 ( def. )
Origin of founder2
First recorded in 1300–50; Middle English foundren, funder, fonder, from Old French fondrer “to plunge to the bottom, submerge,” from Vulgar Latin fundorāre (unattested), derivative of fundor-, an s -stem noun interpreted as stem of Latin fundus, actually an o -stem noun (stem fund- ) “bottom”
Origin of founder3
First recorded in 1400–50; Middle English foundour, founder, from Old French fondeur, from fondre “to melt, cast”; found 3, -er 1
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.
John Peters, the founder and chief executive of Amberjack, said he is also getting hit with higher fuel surcharges from ocean and air carriers and trucking companies.
From The Wall Street Journal • Apr. 3, 2026
The fund, founded in 1929, epitomizes Vanguard Group founder Jack Bogle’s values —own a balanced mix of stocks and bonds, and keep your costs down.
From Barron's • Apr. 3, 2026
Mint.com founder and former CEO Aaron Patzer purchased his modern, glassy, five-bedroom home on 22 acres of oceanfront property—located about an hour’s drive north of Auckland, New Zealand—for $2 million.
From The Wall Street Journal • Apr. 2, 2026
At least in the technology sector—which the Berkshire founder has been famously averse to backing—there do appear to be stocks that have been unduly punished by AI and energy worries.
From Barron's • Apr. 1, 2026
David Neeleman, the founder of JetBlue Airways Corp., has a name for all this.
From "The World Is Flat" by Thomas L. Friedman
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.
