Definition from Wiktionary, the free dictionary
Italian, literally "poor art". The term was coined by Italian art critic Germano Celant and introduced in Italy during the period of upheaval at the end of the 1960s, when artists were taking a radical stance.
a radical Italian modern art movement of the late 1960s and early 1970s
- (art) arte povera (a radical Italian modern art movement of the late 1960s and early 1970s)