night robe
/ˈnaɪt roʊb/
noun
- A loose, comfortable piece of clothing worn for sleeping or relaxing around the house; a nightgown or dressing gown.
- The hotel provided a white cotton night-robe for each guest.
- She put on her soft flannel night-robe before going to bed.
- He answered the door in his night-robe and slippers.
Synonyms