An intifada is an organized rebellion against an authority. The word is most often used to talk about the two Palestinian intifadas against the Israeli government.
Intifada is from the Arabic intafada, "to shake off." It was first used for a 1952 Iraqi uprising against that country's monarchy. A rebellion in 1987, in which Palestinians demonstrated against the Israeli government, attempting to "shake off" Israel’s presence in the West Bank and Gaza, is known as the First Intifada. It was followed by the Second Intifada in 2000, after a peace summit failed to end in agreement between Israelis and Palestinians.