1. A device or structure purposed to control the flow or passage of any of the three states of matter: solid, liquid or gas. Such structures may be found in plumbing, as well as in the human body (specifically, the heart).

2. A company in the game development industry that designed and continues to build upon the Half-Life series. Also, the brains (or lack thereof) behind the infamous "Steam" client, content-delivery platform.
1. Some geniuses find it fun to open the valve on a helium tank, place their mouths over it, and begin hyperventilating.

2. There comes a point in one's life where one must ask life's greatest question: Does Valve's magnificent work with Half-Life outweigh the frustration and uselessness that Steam's impropriety brings? The world may never know.
by HB <3 SA April 24, 2006
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Valve is a gaming company that, while one of the slower companys when it comes to making games, have amazing games. While Valve made Portal, Half-Life, Team Fortress 2, and many more, they also made Steam which is the most used content for buying games online.
Valve makes great games that I would play over and over!
by Texasboy9753 January 5, 2013
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a video game developer. made left for dead the hlaf life series (which was phenomenal) portal, portal 2, counter strike, and above all my personal favorite team fortress 2
8:00-ok maybe ill sit dow play some games n shit tf2 maybe?
9:00:- WTF HAX whatever ill stab that mother fucker later
10:00- A SPY SAPPIN MAH SENTRY
11:00- hmm its getting late should probobly stop soon
12:00- (at this point you are zombified and loving it)
1:00- GENTLEMEN
2:00- CRITICAL HIT? NO WTF????
3:00- fuckin pyros
4:00- valve is the shit but i think my conrtoller died
by Jason snuffelupogous April 2, 2011
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A Computer Game company founded by former Microsoft employee Gabe Newell in 1996 or 1997.

Valve made the computer game classics Half Life and Half Life 2.

Valve has a notorious reputation for being sluggish in game releases, yet notorious for its style.

It's located near Seattle, Washington.
The coolest game developers ever:

1. id software
2. valve
3. infinity ward
by Coolness February 4, 2005
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When Valve releases the Heavy update for Team Fortress 2 or Half Life 3
Person 1: Dude they gonna make a major update for TF2!
Person 2: Omg they are finally valving!
by AerySurah November 9, 2021
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American shitbags from 1999 who promote terrorism in games like Counter-Strike. CIA, FBI and other fags really like them.
Open your mind to terrorism - Gabe Newell, CEO of Valve.

- I just bought a game on Steam
- Fuck you!
by Barkingdog October 5, 2023
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A company defined for releasing games such as Half-Life, Counter-Strike, etc. Not as money-hungry as Activision but still money-hungry.
When is Valve going to make Half-Life 3?
by Shad0w9GS March 12, 2017
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