Russian pron. Avtomat Kalashnikova, obretza 1947 goda.
English: Automatic Kalashnikov, model (of) 1947 (year).

1. Gas-operated, piston-driven, rotating-bolt, air-cooled, select-fire rifle, fed by means of a detatchable 30-round box magazine designed by Sergeant Mikail Kalashnikov circa 1945-46. Submitted to the Soviet Army Ordnance Board for trial in 1947 and introduced to the Soviet Army in 1949. Very few actual AK-47 rifles still exist; most Kalashnikovs are the AKM (Russian pron. Avtomat Kalashnikova Modernizirovannyj obretza 1959 goda. English: Automatic Kalashnikov, Modernised, model of 1959);

2. Popular usage: any Kalashnikov rifle or LMG.
"The AK-47 is the most widely proliferated assault rifle in the world, with an estimated 90 million units having been made since 1949."
by RCEME Rat February 18, 2006
An assault rifle developed in Russia by Mikial Kalashnikov, fires 7.62x39mm ammunition and is the most widespread firearm of the 20th century. It is so simple my 10 year old brother could use it. Requires very little cleaning.
The AK-47 can be dragged through dirt, and without any sort of cleaning whatsoever can still fire.
by Burkus November 19, 2008
The AK-47 is a 7.62 x 39mm assault rifle designed by Mikhail Timofeevich Kalashnikov in 1947, hence its name. It was an outstanding firearm for its time, although was let down to a certain extent by its stamped steel receiver. In 1959, the '47 evolved into the AKM, which is the most common Kalashnikov found today. Visible differences between the AK-47 and AKM are a slanted muzzle and recesses over the magazine housing.

Although frequently compared with the M16, because of their interaction in the Vietnam War, the AK-47 is more comparable to the M14, whereas the M16 is compared with the newer AK-74. The light-support weapon designed from the AK-47 is the RPK.
Quick, shoot that terrorist before he waxes you with his AK-47.
by muth January 23, 2006
The AK-47 (contraction of Russian: Автомат Калашникова образца 1947 года; Avtomat Kalashnikova obraztsa 1947 goda; "Kalashnikov's automatic rifle model of year 1947") is a 7.62 mm assault rifle developed in the Soviet Union by Mikhail Kalashnikov in two versions: the fixed stock AK-47 and the AKS-47 (S—Skladnoy priklad) variant equipped with an underfolding metal shoulder stock.

Design work on the AK began in 1944. In 1946 the rifle was presented for official military trials, and a year later the fixed stock version was introduced into service with select units of the Red Army (the folding stock model was developed later).
Guy:Hey,clerk what do you have?

Clerk:We have AK-47's,RPG's and some Car-15's
by John@Germany February 18, 2009
Russian military designation for the most prolific assault rifle in the world next to the M-16. AK stands for 'Avtomat Kalashnikov'; Russian for Automatic (rifle), Kalashnikov (Mikhail Kalashnikov, the inventor). The 47 is for the year it was first designed, 1947.
by Anonymous April 23, 2003
Bomb ass Chronic that packs a powerful punch.
My boi has the hook up on that AK, no not the kalishnikov the damn weed man.
by Borat March 28, 2005
1: AK-47 is an assault rifle designed in 1947 by Mikhail Kalashnikov.
2: Brought automatic rifle firepower to the masses.
3: Is highly reliable under all circumstances.
4: It is extremely CHEAP! You can get one for $275 in the US and $30 or less in others!
5: An old design that is still feared by the mighty US armed forces.
"Did you see that dude kill that man with an AK-47"?
by NK April 5, 2005