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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.

But in some cases, experience matters more than the raw energy and boundless optimism that often characterizes younger entrepreneurs.

From The Wall Street Journal

The reinstatement of Kim as general secretary brought boundless joy at “guard posts, workplaces and home windows,” the Rodong editorial read.

From The Wall Street Journal

He had put together an enviable sponsorship portfolio of boundless resources, including the full financial might of the state of Saudi Arabia, through its national oil company.

From BBC

And it shows the returns to ambition, boundless optimism, and sense of long-term strategy.

From BBC

But Child became famous by demystifying it with her deep culinary knowledge, boundless enthusiasm, humor and honesty.

From The Wall Street Journal

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.