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file something away (from something)and file something off ((of) something); file something off
to remove something from something else by filing. (Of is usually retained before pronouns.) The dentist filed the sharp point away from the tooth. The dentist filed away the sharp point from the tooth. The dentist filed the point off.
1. To rub against something with or as if with a file until it is smooth or gone: I filed the rough skin away with a pumice stone. The foot doctor filed away my bone spurs.
2. To file some document or other material into the appropriate place: The secretary filed the legal documents away. The receptionist filed away the important memos.