This is when a man unloads an inordinate amount of manjuice into another dude's beard. It works better if its a big beard, like Osama's.

Holy war in the defense of Islam or Muslim liberty.

a word that has been interpreted a million different times and a million different ways.

radical Translation: kill anyone that is not muslim

educated Translation: War within oneself; struggle to find the true meaning of islam

More than one Jihad; multiple holy wars.

Also, a word that will likely give you an uncontested victory over your feeble-minded opponents in Scrabble.

Jihad is often translated as "Holy War", although a closer translation from its arabic origins is "struggle towards good", whether that means internal strife or fighting against those who attempt to destroy Islam.

Also note, the word Jihad does not mean to kill infidels as is often said by racist fatherless children ie-bastards, but rather defend Islam against those who wish to destroy it. Islam does not say to conquer the world and enslave or kill all infidels.

Jihad, widely but perhaps loosely translated as 'struggle', a religious word that on a personal level is a spiritual struggle on a small-scale eveyday matter, the Jihad results in a form of abstinence, so to place a Jihad on selling drugs, is to recognise the immorality of the action, remind oneself not to sell drugs, or abstain from selling drugs if one already does so.
To rid yourself from an evil as such.
Religious Extremists might, I suppose, take the 'ridance of an evil' to such levels as a war on Infidels/corrupt Western civilisation but I have never met a Fundamentalist Muslim Extremist and so would not know.

an irrational, mindless quest for revenge, derived from the Islamic term for struggle.