Dictionary.com
Thesaurus.com
Synonyms

boundless

American  
[bound-lis] / ˈbaʊnd lɪs /

adjective

  1. having no bounds; bound; infinite or vast; unlimited.

    His boundless energy amazed his friends.
    Synonyms:
    illimitable, inexhaustible, unbounded, endless, limitless
boundless British  
/ ˈbaʊndlɪs /

adjective

  1. unlimited; vast

    boundless energy
"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

  • boundlessly adverb
  • boundlessness noun

Etymology

Origin of boundless

First recorded in 1585–95; bound 3 + -less

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.

One would expect boundless enthusiasm on management’s part after a day like that, but CEO Christian Weedbrook is maintaining a “business as usual” approach as he focuses on the company’s long-term goals.

From Barron's

As a pup, the four-legged hero's boundless energy made it tough to stay indoors, but he found his true potential in the bush.

From Barron's

The variety of custom adventures will be boundless.

From The Wall Street Journal

“His vision and energy surrounding this great event remained boundless for 50 years.”

From Los Angeles Times

People now face such a vast menu of options due to technology that the choices in life seem boundless, but that abundance didn’t spark curiosity in Kelly.

From MarketWatch

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.