A pogrom is a violent riot incited with the aim of massacring or expelling an ethnic or religious group, usually applied to attacks on Jews. The term entered the English language from Russian to describe late 19th- and early 20th-century attacks on Jews in the Russian Empire. Retrospectively, similar attacks against Jews which occurred in other times and places were renamed pogroms. Contemporarily, the word is also used to describe publicly sanctioned purgative attacks against non-Jewish groups. The characteristics of a pogrom vary widely, depending on the specific incident, at times leading to, or culminating in, massacres.