hardrock

noun

1. the original form of rock-‘n’-roll, basically dependent on a consistently loud and strong beat.

adjective

1. (loosely) of or relating to igneous or metamorphic rocks, as in mining (hard-rock mining) and geology (hard-rock geology).

adjective

1. (of mining) concerned with extracting minerals other than coal, usually from solid rock

noun

2. slang a tough uncompromising man

noun

1. music a rhythmically simple and usually highly amplified style of rock and roll