Disco/ˈdɪskəʊ/ Definition 1 of 3Pro Tip 1/3Nightlife Activity Disco is primarily associated with socializing and entertainment at night. They hit the disco every Saturday night. Pro Tip 2/3Retro Vibe 'Disco' can evoke nostalgic feelings for the 70s and 80s nightlife scene. My parents met at a disco back in the 80s. Pro Tip 3/3Energetic Atmosphere Disco suggests an upbeat and lively environment for dancing. The disco was so energetic that everyone was dancing.