What does MAINTAIN mean?

verb

1. keep in a certain state, position, or activity; e.g.,“keep clean”
2. keep in safety and protect from harm, decay, loss, or destruction“We preserve these archeological findings”
3. supply with necessities and support“She alone sustained her family”
4. state categorically
5. have and exercise“wield power and authority”
6. maintain for use and service“I keep a car in the countryside”
7. maintain by writing regular records“keep a diary”
8. state or assert“He maintained his innocence”