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hard rock

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noun
  1. the original form of rock-'n'-roll, basically dependent on a consistently loud and strong beat.
Compare soft rock.

Origin of hard rock

First recorded in 1965–70
Related formshard rocker, noun

hard-rock

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

Origin of hard-rock

First recorded in 1920–25
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for hardrock

hardrock

adjective
  1. (of mining) concerned with extracting minerals other than coal, usually from solid rock
noun
  1. slang a tough uncompromising man

hard rock

noun
  1. music a rhythmically simple and usually highly amplified style of rock and roll
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012