It means voluntarily joining an organization, group, or entity. It is the action or effect of enter, enter, rise, straightening, stand up, rise up, integrate, unite, added.
join, enter or form part of something, it can be a group or a place
Add means add, place an ingredient to a recipe. INCORPORATE means get up, stand up, followed suit. Also is used by the umbanda religion to indicate that a "spirit" or entity got the body of the medium