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IU

American  
  1. immunizing unit.

  2. Also I.U. international unit.


IU British  

abbreviation

  1. immunizing unit

  2. international unit

"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

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.

Because what on earth is going on at IU?

From The Wall Street Journal • Oct. 13, 2025

In a delightful bit of magical TV storytelling, K-pop superstar IU plays both the young adult Ae-sun and later her own grown daughter.

From Salon • Jun. 28, 2025

Reports of artemisinin resistance first surfaced in Southeast Asia in 2008 before emerging in East Africa, a trend the IU research team unexpectedly observed through their ongoing work in Uganda.

From Science Daily • Nov. 14, 2024

IU, whose real name is Lee Ji-eun, may not be a household name in America just yet, but the K-pop singer is an icon in South Korea.

From Los Angeles Times • Aug. 5, 2024

“I mean, it’s less than half of what IU would cost,” which was the state school a couple hours south of us in Bloomington.

From "Turtles All the Way Down" by John Green