gown

Short definition from Wiktionary

Noun

1. 1
   A loose, flowing upper garment.
2. 2
   A woman's ordinary outer dress, such as a calico or silk gown.
3. 3
   The official robe of certain professionals, clerics, and scholars, such as university students and officers, barristers, judges, etc.
4. 4
   The official robe of certain professionals, clerics, and scholars, such as university students and officers, barristers, judges, etc: The dress of civil officers, as opposed to military officers.
5. 5
   The university community, especially as contrasted with the local populace.
6. 6
   A loose wrapper worn by gentlemen within doors; a dressing gown.
7. 7
   Any sort of dress or garb.
8. 8
   The robe worn by a surgeon.

Verb

1. 1
   To dress in a gown, to don or garb with a gown.