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ad infinitum

American  
[ad in-fuh-nahy-tuhm, adin-] / æd ˌɪn fəˈnaɪ təm, ˌædɪn- /

adverb

  1. to infinity; endlessly; without limit. ad inf., ad infin


ad infinitum British  
/ æd ˌɪnfɪˈnaɪtəm /

adverb

  1.  ad inf.  without end; endlessly; to infinity

"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

Etymology

Origin of ad infinitum

From Latin

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.

See Examples For:

Film, he did, ad infinitum, particularly enjoying the spy genre in “Tinker Tailor Soldier Spy,” which garnered him his first Oscar nomination as lead actor in 2012, long before Jackson Lamb appeared on his radar.

From Los Angeles Times Aug. 5, 2025

But is it the best way to spent $600 million–plus in taxpayer dollars, every year, ad infinitum?

From Slate Jul. 8, 2025

One takes place and then another one occurs ad infinitum.

From Salon Mar. 18, 2024

Thorvaldsdottir, in a mode characteristically abstract yet suggestive, could prolong an idea like this ad infinitum.

From New York Times Apr. 21, 2023

Flies with heads and tails make eggs with heads and tails, which make embryos with heads and tails, which grow into flies with heads and tails, and so forth, ad infinitum.

From "The Gene" by Siddhartha Mukherjee

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