subbing

1. To substitute for.
2. To work as a substitute teacher, especially in primary and secondary education.
3. To replace (a player) with a substitute.

   He never really made a contribution to the match, so it was no surprise when he was subbed at half time.

4. Less commonly, and often as sub on, to bring on (a player) as a substitute.

   He was subbed on half way through the second half, and scored within minutes.

5. To perform the work of a subeditor or copy editor; to subedit.
6. To lend.
7. To subscribe.
8. (BDSM) To take a submissive role.

1. To coat with a layer of adhering material; to planarize by means of such a coating.
2. To prepare (a slide) with a layer of transparent substance to support and/or fix the sample.

noun

A copy editing process.