Dictionary.com
Thesaurus.com
Showing results for boundless. Search instead for boundnesses.
Synonyms

boundless

American  
[bound-lis] / ˈbaʊnd lɪs /

adjective

  1. having no bounds; 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

Etymology

Origin of boundless

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

Explanation

Something that's boundless has no limits or restrictions. Your dog's boundless energy might leave you exhausted, since it never seems to end. The adjective boundless is often used to mean "huge" or "immense." Your local Christmas tree farm, for example, might seem boundless as you walk through the rows of evergreens that stretch as far as you can see. If your little brother has boundless enthusiasm for superheros, he's probably capable of talking about Batman for hours. The noun bound originally meant "limit," from the Old French word bonde, "limit or boundary," so boundless means "without limit."

Keep Reading on Vocabulary.com

Vocabulary lists containing boundless

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.

"Joanne's love for her child was boundless, and the centre of her world. She was a devoted and loving mother," they said.

From BBC • May 7, 2026

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 • Mar. 30, 2026

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

From Los Angeles Times • Mar. 22, 2026

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 • Mar. 13, 2026

Uncle Matthew was like Detective Webster in his joking and boundless sense of joy.

From "The Detective's Assistant" by Kate Hannigan

Vocabulary.com logo
by dictionary.com

Look it up. Learn it forever.

Remember "boundless" for good with VocabTrainer. Expand your vocabulary effortlessly with personalized learning tools that adapt to your goals.

Take me to Vocabulary.com