IPA: /ˈhɛəpiːs/
KK: /ˈhɛrˌpis/
A piece of hair, either real or artificial, that is worn on the head to cover baldness or to enhance a hairstyle.
She wore a hairpiece to make her hair look fuller for the party.
Hairpiece → The word is formed from "hair" (from Old English *haer*, meaning the fine strands growing from the skin of humans and animals) and "piece" (from Old French *piece*, meaning a part or fragment). A hairpiece refers to a part of hair that is added to one's own hair for enhancement or coverage.
Think of 'hair' as the fine strands on your head and 'piece' as a part that you add — a hairpiece is simply a part of hair that you add to your own.