endless
Americanadjective
-
having or seeming to have no end, limit, or conclusion; boundless; infinite; interminable; incessant.
an endless series of complaints; Time is endless.
- Synonyms:
- perpetual, continuous, unceasing, unending, illimitable, limitless
-
made continuous, as by joining the two ends of a single length.
an endless chain or belt.
adjective
-
having or seeming to have no end; eternal or infinite
-
continuing too long or continually recurring
-
formed with the ends joined
an endless belt
Synonym Usage
See eternal.
Other Word Forms
Etymology
Origin of endless
First recorded before 900; Middle English endelees, Old English endelēas. See end 1, -less
Explanation
Things that are endless go on forever, or at least appear to. The ocean looks endless when you sail out of sight of the shore. Endless things are infinite — your love for someone might be endless, and the mathematical symbol of infinity represents an endless number. You're most likely to use this adjective to describe things that only seem to last forever, like an endless meeting at work or an endless commute during rush hour. The Old English root of endless is endeleas, "boundless or eternal."
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.
Submissions, limited to 2,500 words, will undergo a simple merit review rather than endless rounds of gatekeeping.
From The Wall Street Journal • May 27, 2026
It’s a phenomenon they call “vibe slop”—a combination of “vibe coding,” creating software with AI tools by describing it in plain English, and “AI slop,” the endless, low-value AI-generated content all over social media.
From The Wall Street Journal • May 22, 2026
Instead of buying an endless parade of individual ingredients, you’re strategically outsourcing part of the flavor-building process.
From Salon • May 19, 2026
Its elements have been duplicated, sampled and reimagined so many times that it now exists in countless forms, offering endless ways in.
From Los Angeles Times • May 19, 2026
My head rattled with all I’d been through—the tipping hat brim, the endless sea, all those humans.
From "Secrets at Sea" by Richard Peck
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.
