: not usual or common : not customary
: not familiar with something so that it does not seem normal or usual : not used to something
What made you want to look up unaccustomed? Please tell us where you read or heard it (including the quote, if possible).
Take our visual vocab quiz
A quick quiz about stuff worth knowing
The commonly misspelled words quiz
The Vocab Quiz Game for iPhone & iPad
"Incredibly fun and addictive. And informative!" User Review, iTunes