"What does civilian work outside your military job mean"
This is asking if you, the military person, has a job for which you are paid outside of the military (often a part-time job).
The reason this is asked is that it's common for your military pay to be taxable in your state of record and for your outside-the-military pay to be taxed in the state in which you are living and working.
As for your spouse, I think that this is generally a separate question, but it is asked for the same reason.
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