What is the meaning of Hardcore?

Having an extreme dedication to a certain activity.

Particularly intense; thrillingly dangerous or erratic; desirably violent in appearance; pleasing or "cool" due to intensity or danger.

Resistant to change.

Depicting penetration and abnormal sexual activity.

Faster or more intense than the regular style.

Broken bricks, stone and/or other aggregate used as foundations, especially in road and path laying.

Several music genres, including:

In a hardcore manner; intensely or extremely.

something hardcore (particularly intense)

hardcore (hardcore punk or techno music)

Source: wiktionary.org

See also