The following words and phrases, when used in this article, shall have the following meanings:
Any industrial, commercial or other business property owned by an individual, association or corporation, located in a deteriorating area, as hereinafter provided, or any such property which has been the subject of an order by a government agency requiring the unit to be vacated, condemned or demolished by reason of noncompliance with laws, ordinances or regulations.
Repair, construction or reconstruction, including alterations and additions, having the effect of rehabilitating a deteriorating property so that it becomes habitable or attains higher standards of safety, health, economic use or amenity, or is brought into compliance with laws, ordinances or regulations governing such standards. Ordinary upkeep and maintenance shall not be deemed an improvement.