hardcore /hɑː(ɹ)dˈkɔː(ɹ)/adjective 7noun 7adverb 1forms 3 adjective7 •Having an extreme dedication to a certain activity.He's a hardcore gamer. •Faster or more intense than the regular style. •(informal) Particularly intense; thrillingly dangerous or erratic; desirably violent in appearance; pleasing or "cool" due to intensity or danger.That show was hardcore, dude. •Obscene or explicit. •Depicting penetration and abnormal sexual activity. •Resistant to change. •So hard as to require extreme dedication to complete. noun7 •Several music genres. •Hardcore punk.Fields began recording the hardcore punk bands in 1978 when few others would. — 1981 •Gangsta rap. •Hardcore techno. •Jungle. •Outlaw country. •Broken bricks, stone and/or other aggregate used as foundations, especially in road and path laying.You need to excavate and remove the topsoil, line the subsoil with a geotextile, then lay and compact hardcore. — 2014 adverb1 •(informal) In a hardcore manner; intensely or extremely. formsmore hardcore · hardest-core · most hardcore