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• IV
  IV

  noun

  an intravenous device for delivering electrolyte solutions, medicines, and nutrients.
• i.v.
  i.v.

  abbreviation

  increased value.
• I.V.
  I.V.

  abbreviation

  initial velocity.

IV

¹ American  

[ahy-vee] / ˈaɪˈvi /

noun

IVs, plural IV's plural

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

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IV ² American  

abbreviation

1. intravenous.

2. intravenous drip.

3. intravenous injection.

4. intravenously.

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i.v. ³ American  

abbreviation

1. increased value.

2. initial velocity.

3. invoice value.

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I.V. ⁴ American  

abbreviation

1. initial velocity.

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i.v. British  

abbreviation

1. intravenous(ly)

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Other Word Forms

Inflected Forms

noun

• IV's
  plural
• IVs
  plural

Etymology

Origin of IV

First recorded in 1950–55

Example Sentences

Artemis IV, targeted in 2028, is now planned to be the first crewed lunar landing of the modern era.

From BBC • Jun. 9, 2026

I didn’t keep up with the franchise—somewhere around GTA IV, I got married, and before long I was immersed in an even more chaotic open-worlder called parenting.

From Barron's • May 21, 2026

The lineup for the current fiscal year includes “Assassin’s Creed Black Flag Resynced,” a remake of “Assassin’s Creed IV Black Flag” from 2013 that is expected to be released on July 9.

From The Wall Street Journal • May 20, 2026

Two floors below, IV bags filled with grasses, fungus and a wasp nest hang from the ceiling as part of a meditation on the healing aspects of the environment.

From Los Angeles Times • May 20, 2026

Jeffrey kept squeezing my hand really hard for a few minutes, until the blood specimens had all been taken and an IV line was hooked up to his port.

From "Drums, Girls, and Dangerous Pie" by Jordan Sonnenblick