Definition of "Proper" :

adjective: appropriate for a condition or purpose or occasion or a person's character, needs

"Everything in its proper place."

adjective: limited to the thing specified

"The city proper."

adjective: marked by suitability or rightness or appropriateness

"Proper medical treatment."

adjective: having all the qualities typical of the thing specified

"Wanted a proper dinner, not just a snack."