Real Dictionary

robe
countable noun: A robe is a loose piece of clothing which covers all of your body and reaches the ground. You can describe someone as wearing a robe or as wearing robes.
countable noun: A robe is a piece of clothing, usually made of towelling, which people wear in the house, especially when they have just got up or had a bath.

robe in American English
a long, loose or flowing outer garment
to dress in or cover with a robe or robes
intransitive verb: to put on a robe
noun: a long, loose or flowing gown or outer garment worn by men or women as ceremonial dress, an official vestment, or garb of office
transitive verb: to clothe or invest with a robe or robes; dress; array

robe in British English
noun: any loose flowing garment, esp the official vestment of a peer, judge, or academic
verb: to put a robe, etc, on (oneself or someone else); dress