countless

adjective

count·​less ˈkau̇nt-ləs 

: too numerous to be counted : myriad, many

countlessly adverb

Synonyms

• innumerable
• innumerous
• myriad
• numberless
• uncountable
• uncounted
• unnumbered
• untold

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

This week, on the Billboard charts, Cowboy Carter gains dramatically, fueled by a surge in interest, which follows extensive media coverage and countless videos and photos that have been shared by attendees. —Hugh McIntyre, Forbes.com, 9 May 2025

To find the softest mattress possible for every personal preference, our team caught countless hours of sleep and kept the below factors in mind. —Nashia Baker, Architectural Digest, 9 May 2025

This island, 74 square miles and the largest of the Southern Gulf cluster, is home to countless creatives, who’ll be shilling their wares during summer via the Salt Spring Market in Centennial Park every Saturday. —Mark Ellwood, AFAR Media, 8 May 2025

Working independently, Ani has produced countless other short films, music videos, commercials and campaigns for brands such as Expedia, Nike, A24, Universal Music, Anomaly, Object & Animal, and Tommy Hillfiger. —Matt Grobar, Deadline, 8 May 2025

Word History

First Known Use

1588, in the meaning defined above

Kids Definition

countless

adjective

count·​less ˈkau̇nt-ləs 

: too numerous to be counted : innumerable