additionalstep

noun
UK /əˈdɪʃənl stɛp/
US /əˈdɪʃənl stɛp/

One more thing you have to do after the other things.

After you finish the puzzle, there is an additional step: put it back in the box.


OTHER MEANINGS

2. A stage added to a plan that was not there at first.

The teacher added an additional step to our science project.

3. An extra action needed to finish something correctly.

Washing your hands is an additional step before cooking.

4. A small job that comes after the main job.

Saving the file is an additional step after typing your story.