Based on the American sitcom Friends S04E23: Transcription of "The One with Ross's Wedding" as Transcribed by Eric Aasen. Monica: Emily has probably been planning it since she was five! Ever since the first time she took a pillowcase and hung it off the back of her head. What's the meaning of the word "off" here? I've looked up the dictionary for a long time, but didn't find a proper definition. It seems most definitions tend to be "away from something". But I guess Monica wanted to convey that "she used the pillowcase as a scarf, wore it around her head". But I didn't find such a definition. So what's the exact meaning of "off" here? Thanks in advance, my friends.