Adjective hard core has 3 senses
  1. hard-core, hardcore - stubbornly resistant to change or improvement; "hard-core addicts"
    Antonym: flexible (indirect, via inflexible)
  2. hard-core, hardcore - intensely loyal; "his hard-core supporters"
    Antonym: disloyal (indirect, via loyal)
  3. hard-core, hardcore - extremely explicit; "hard-core pornography"
    Antonyms: implicit, inexplicit (indirect, via explicit)
,Noun hard core has 1 sense
  1. hard core - the most dedicated and intensely loyal nucleus of a group or movement
    --1 is a kind of
    clique, coterie, ingroup, inner circle, pack, camp
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