countless

adjective

count·​less ˈkau̇nt-ləs 

: too numerous to be counted : myriad, many

countlessly adverb

Synonyms of countless

• many
• numerous
• innumerable
• numberless

Examples of countless in a Sentence

There are countless reasons why that would not be a good idea.

I've been there countless times.

Recent Examples on the Web

Because coverage is guaranteed, people do not have to agonize every year over choosing a health plan based on countless variables. —Jamie Hartmann-Boyce, The Conversation, 19 Mar. 2026

Luckily, today’s affordable beauty is packed with countless high-shine glosses, dewy setting sprays, innovative concealers, and so much more—all of which deliver luxurious results without the luxury price tag. —Catharine Malzahn, Glamour, 18 Mar. 2026

Butter is a staple in many kitchens and makes countless meals, snacks and sweets taste better. —Cody Godwin, USA Today, 18 Mar. 2026

The San Francisco rock outlet stopped at Gainbridge Fieldhouse Tuesday on its Final Frontier tour, which is ostensibly a farewell road trip after 15 studio albums and countless shows over the band’s more than 50-year run. —Heather Bushman, IndyStar, 18 Mar. 2026

Word History

First Known Use

1593, in the meaning defined above

Kids Definition

countless

adjective

count·​less ˈkau̇nt-ləs 

: too numerous to be counted : innumerable