Definitions

countless

[kount-lis] / ˈkaʊnt lɪs /

ADJECTIVE

innumerable

Synonyms

STRONGEST

endless myriad uncounted untold

WEAK

bags of gobs heap immeasurable incalculable infinite innumerous jillion legion limitless loads lots of many measureless mess mint mucho multitudinous numberless oodles passel of peck pile raft scads slew stack tidy sum umpteen uncountable wad whole slew zillion

Antonyms

STRONGEST

few limited

WEAK

calculable countable counted measurable numbered numerable

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.

And there is a big downside: Steel and aluminum are key inputs to countless other industries, who became less competitive because of those higher prices.

From The Wall Street Journal • Apr. 18, 2026

The internet age has had countless positive impacts on society, but also undeniable negative impacts.

From Salon • Apr. 16, 2026

Studying dense crowds is difficult because individuals can take countless possible paths and interact in unpredictable ways, Liu explained.

From Science Daily • Apr. 15, 2026

He has engaged in countless bilateral forums, work groups and discussions about immigration, drug trafficking, cross-border commerce and other concerns, and generally received good marks from U.S. officials.

From Los Angeles Times • Apr. 14, 2026

I’d read countless reports on the Lincoln assassination.

From "Glitch" by Laura Martin

Vocabulary lists containing countless

Much Ado: Synonyms for "Many"

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Talk Like Shakespeare Day, List 6

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"Dogs at Work"

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