A nuclear equipped walking battle tank. Metal Gear Rex was held by the army, with legendary technology. The US marines later made use of Metal Gear Ray, which was amphibious, unlike the army's Rex. Metal Gear Arsenal was disguised as a rig in the middle of a lotta water. It was revealed to be more than just a weapon, containing nearly every piece of valuable information to the US government. It wasn't just a weapon, but the core of the country. It was guarded by a bunch of Rays. I don't know where the story goes from there, as I have not gotten Metal Gear Solid 3 yet.
Wow. It's a cool name that has been re-used for projects of killing machines and databases for the US government.
by blah December 26, 2004
Top Definition
The best video game series of all time.
That's just my opinion.
by Adrian January 19, 2005
A gigantic nuclear capable bipedal tank. Designed to be able to launch a nuke anywhere on the planet thus giving its user an great advantage in undetectable first strike capability. Often terrorist seize these powerful weapons and have to be stopped by the player (Solid Snake, Raiden, Big Boss).

Featured in the games Metal Gear (MSX, NES, Commodore 64), Metal Gear 2: Solid Snake (MSX), Metal Gear Solid (PS, PC), and Metal Gear Solid 2: Sons of Liberty/Substance (PS2, Xbox), Metal Gear Solid: The Twin Snakes (GC) and Metal Gear Solid 3: Snake Eater (PS2).
"Metal Gear is nothing but nuclear equipped walking death mobile!"
-Solid Snake
"Now you shall bear witness to the demon weapon that will drag the world into the 21st century!"
-Liquid Snake
by Preacher January 29, 2004
1. Popular video game.

2. Used as a mocking expression (spoken in a rough manly voice) when someone repeats what another person just said as a question (Much like solid snake does in the metal gear series).
Person #1
"It's called Metal Gear"

"Metal Gear?"


Person #1
"Hey look, a Plane"

Person #2:
"A Plane?"

Person #1:
"Metal Gear?"
by Maul May 06, 2005
A bipedal tank, capable of launching nuclear missles from anywhere on the face of the planet. Its earliest incarnation was the Shagohod, a tank which, using rocket boosters and about 3 miles of runway, was designed to launch ICBMs. This was destroyed in 1964 during Operation Snake Eater. Metal Gear as we know it today surfaced in 1995 in Outer Heaven, ironically in use by the man who destroyed its earlier model, Big Boss. After being destroyed, another Metal Gear appeared in Zanzibar land. After Solid Snake destroyed it and killed his father, he retired, until 6 years later, the US government decided to build their own model, REX. Liquid Snake and the rest of FOXHOUND took control of the Shadow Moses facility until Solid Snake destroyed it. After that, various models began turning up around the world.
Metal Gear! It can't be!
by Snake March 15, 2005
A nuclear equipped walking death mobile.Origanally designed to shoot down nuclear missles.For defensive purposes of course
LIAR! I already know that Metal Gear is nothing but a nuclear equipped walking death mobil!
by (insert name here) October 13, 2003
Term applied to bipedal tanks, designed primarily to launch ICBMs from any point on Earth, thus rendering the concept of nuclear deterance moot, as well as eliminating the need for expensive silos or nuclear subs.

Metal Gears also serve the role of assault, artillery, anti-vehicle, anti-personell, escort, theatre-missile-defence, as well as numerous other functions with their heavy armaments. The numerous models over the decades have been armed with heavy machine-guns, rockets, hellfire missles, laser systems, rail-guns, hydro-cannons, and various other conventional and unconventional weapons.

In addition to carrying ICBMs, Metal Gears have been known to carry cluster-bombs, cruise missiles, and various other assault payloads in its missile tubes.

The Metal Gear is a fictional weapon-system.
No government has stepped forward for the nuclear attack, and no nation can be accused. NATO suspects that a Metal Gear was involved.
by Theorem March 02, 2005
A nuclear-equipped walking battle tank also equipped with state-of-the-art conventional weaponry such as missiles, heavy machine guns, and lasers. It's main selling point was its ability to launch a variety of nuclear warheads toward anywhere on Earth from any location. It had the ability to more independently and instead of using a standard nuclear launch module, it was equipped with a weapon, which allowed it to launch a nuclear weapon with no external support. Since it could operate from regions, which were up to that point not on the world's nuclear strategy map, it was a weapon that destroyed the sensitive balance of nuclear deterrence and represented an enormous threat to the entire world.
You would really not want to be standing in front of Metal Gear Rex if it had a pilot who was unfriendly towards you....
by Solid Snake June 23, 2004
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