Jihad is an Islamic religious term that most often means a kind of inner struggle for a spiritual goal. Many Muslims view jihad as an important duty of their religious life.
The word jihad literally means "struggle" in Arabic. It's an important concept in Islam, one that appears dozens of times in the Quran, usually in the sense of a believer's internal struggle to be a good Muslim and fulfill essential religious duties. In Western popular culture and news, and among some groups of Muslims, jihad is more often used to mean "holy war," or a violent struggle against the enemies of Islam.