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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.

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

It felt like a glimpse of one plausible, fast-arriving future: generative AI products reviewing other generative AI products ad infinitum — bad AI content all the way down.

From Los Angeles Times • Jan. 18, 2024

Depending on the initial placement of the constituent cells, their clusters can showcase surprisingly complex behaviors such as self-replication ad infinitum.

From Scientific American • Apr. 6, 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