hardcore

Short definition from Wiktionary

Adjective

1. 1
   Having an extreme dedication to a certain activity.
2. 2
   So hard as to require extreme dedication to complete.
3. 3
   Particularly intense; thrillingly dangerous or erratic; desirably violent in appearance; pleasing or "cool" due to intensity or danger.
4. 4
   Resistant to change.
5. 5
   Obscene or explicit.
6. 6
   Depicting penetration and abnormal sexual activity.
7. 7
   Faster or more intense than the regular style.

Noun

1. 1
   Broken bricks, stone and/or other aggregate used as foundations, especially in road and path laying.
2. 2
   Several music genres, including: Hardcore punk.
3. 3
   Several music genres, including: Gangsta rap.
4. 4
   Several music genres, including: Hardcore techno.
5. 5
   Several music genres, including: Jungle.
6. 6
   Several music genres, including: Outlaw country.

Adverb

1. 1
   In a hardcore manner; intensely or extremely.