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⇱ IV Definition & Meaning | Dictionary.com

IV

1 American  
[ahy-vee] / ˈaɪˈvi /

noun

plural

IVs, IV's

  1. an intravenous device for delivering electrolyte solutions, medicines, and nutrients.

IV 2 American  

abbreviation

  1. intravenous.

  2. intravenous drip.

  3. intravenous injection.

  4. intravenously.

i.v. 3 American  

abbreviation

  1. increased value.

  2. initial velocity.

  3. invoice value.

I.V. 4 American  

abbreviation

  1. initial velocity.

i.v. British  

abbreviation

  1. intravenous(ly)

"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 IV

First recorded in 1950–55

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.

The Artemis program aims to return Americans to the lunar surface and establish a permanent moon presence, with Artemis IV targeting a 2028 landing.

From Barron's • Apr. 1, 2026

A nurse has injected a dose of stem cells into Kenneth Scott through an IV in his arm; earlier, those same stem cells had been extracted from Scott’s body so they could be “activated.”

From Slate • Mar. 30, 2026

On Friday, Irvine University won the Division IV boys’ title with a 3-2 win over Del Mar.

From Los Angeles Times • Mar. 14, 2026

His son Charles IV cemented that legacy, rebuilding Prague Castle with an eye to Paris, where he had been raised.

From The Wall Street Journal • Mar. 13, 2026

Me with an IV drip in my arm, the bag bursting with butterflies of different shapes and colors and sizes.

From "Five Feet Apart" by Rachael Lippincott

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.