IPA: //ˈbɛdˌɡaʊn//
KK: /bɛdgaʊn/
A type of clothing worn for sleeping, typically a loose-fitting dress.
She wore a soft bedgown to bed every night.
The word 'bedgown' is formed from 'bed' (from Old English 'bed', meaning a place for sleeping) and 'gown' (from Old French 'goune', meaning a long, loose outer garment). A bedgown is thus a loose garment worn in bed or around the house.
Think of a 'bed' as a place for sleeping and a 'gown' as a loose garment. This helps you remember that a bedgown is a garment worn in bed.