in·​fi·​nite·​ly | \ ˈin-fə-nət-lē How to pronounce infinitely (audio) \

Definition of infinitely

: 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

First Known Use of infinitely

15th century, in the meaning defined above

History and Etymology for infinitely

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

Learn More About infinitely

Time Traveler for infinitely

Time Traveler

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

See more words from the same century

Dictionary Entries Near infinitely

infinite integral


infinite proposition

See More Nearby Entries 

Statistics for infinitely

Cite this Entry

“Infinitely.” Dictionary, Merriam-Webster, Accessed 25 Sep. 2022.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon

More from Merriam-Webster on infinitely

Nglish: Translation of infinitely for Spanish Speakers


Test Your Vocabulary

Words Named After People

  • name tags
  • Namesake of the leotard, Jules Léotard had what profession?
True or False

Test your knowledge - and maybe learn something along the way.

Universal Daily Crossword

A daily challenge for crossword fanatics.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!