Question 1

What does "file off" mean?

Accepted Answer

To remove material such as rust, a burr, or a sharp edge from an object by rubbing with a file.

Question 2

How do you use "file off" in a sentence?

Accepted Answer

He filed off the rough burr on the metal pipe before connecting it.

Question 3

Is "file off" formal or informal?

Accepted Answer

"file off" is register-neutral — appropriate in both casual and formal contexts. Has two distinct uses: the physical act of removing material with a file (transitive, separable) and the movement sense of departing in a line (intransitive, inseparable). The movement sense is less common than 'file out'.

file off

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