Real Dictionary

snug
adjective: If you feel snug or are in a snug place, you are very warm and comfortable, especially because you are protected from cold weather.

snug in American English
protected from the weather or the cold; warm and cozy
adjective: warmly comfortable or cozy, as a place, accommodations, etc
adverb: in a snug manner
intransitive verb: to lie closely or comfortably; nestle
noun: a small, secluded room in a tavern, as for private parties
transitive verb: to make snug

snug in British English
adjective: comfortably warm and well-protected; cosy
noun: (in Britain and Ireland) one of the bars in certain pubs, offering intimate seating for only a few persons
verb: to make or become comfortable and warm