DEF Jam is a prominent American record label founded in 1984 by Rick Rubin and Russell Simmons. It specializes in hip-hop and urban music, playing a significant role in popularizing the genre. The label has launched the careers of many influential artists, including LL Cool J, Beastie Boys, and Jay-Z. Over the years, DEF Jam has expanded its reach, signing a diverse roster of talent and producing numerous hit albums. It is known for its innovative marketing strategies and collaborations, contributing to the evolution of hip-hop culture and its mainstream acceptance in the music industry.