adj.
- Intensely loyal; die-hard: a hard-core secessionist; a hard-core golfer.
- Stubbornly resistant to improvement or change: hard-core poverty.
- Extremely graphic or explicit: hard-core pornography.
The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.