: to an infinite or seemingly infinite extent or degree
an infinitely large number
It is clear that when an infinite number of positive quantities are added, the result will be infinitely large unless the quantities diminish in size to zero.—Dan Kalman
… we know that the world is infinitely more complicated than the child thinks.—Robert Penn Warren
… in learning about the amazing complexity of the computer, we come to appreciate the infinitely more amazing complexity of the human brain …—Alex Raskin
He swivels his head almost 360 degrees, like a Japanese puppet-balloon held aloft on a stick. The face is infinitely old, infinitely wise, very catlike.—Maxine Kumin

Examples of infinitely in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
This translates into infinitely many families of identities, one for every value of a. — Lyndie Chiou, Scientific American, 29 Oct. 2026 The authors propose a more systemic understanding of desire as one cog in an organic machine, infinitely reacting to other machines. — Shanti Escalante-De Mattei, ARTnews.com, 26 Oct. 2026 Use the Right Cleaning Products Like with any cleaning chore, using the right cleaning products is essential for making the task infinitely easier. — Kate McKenna, The Spruce, 23 Oct. 2026 Li has bewitched the fashion set with his eye for color-blocking—which is almost Lego-like, but infinitely chicer—and his topsy-turvy take on American sportswear. — José Criales-Unzueta, Vanity Fair, 21 Oct. 2026 See All Example Sentences for infinitely

Word History

Etymology

Middle English infynytly, from infynyt infinite entry 1 + -ly -ly entry 2

First Known Use

15th century, in the meaning defined above

Time Traveler
The first known use of infinitely was in the 15th century

Cite this Entry

“Infinitely.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/infinitely. Accessed 1 Nov. 2026.

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