Not fillable; not able to be filled. / Able to be unfilled.

Not filled, especially occupational positions.

simple past tense and past participle of unfill

(transitive) To empty.

Third-person singular simple present indicative form of unfill

present participle of unfill

Not filling.

That has not been filed. / Not rubbed with a file.

present participle of unfile

(transitive) To remove from a file or record.