1: The procedure of keeping an object or place in good condition: The maintenance, or care of the playground, involved repairs jobs, sand cleaning, and disposing of garbage; all of which cost the town more than it had planned.
2: Financial support for a person’s expenses; alimony: Not only did Greg have to keep up his own maintenance of living, but he also had to pay for his two children who were living with their mother, his former wife.

A behavior pattern in animals consisting of the occupation and defense of a territory: Territoriality is the behavior pattern in some animals in which they tend to remain within a certain area, primarily for the purpose of feeding, mating, and rearing their young and importantly this area is defended against members of the same species and also sometimes with other similar species.