The parts of the Mass whose parts change daily, as distinct from the ordinary The proper consists of the introit, Gradual, Alleluia or Tract, Offertory, and Communion
You use proper to describe things that you consider to be real and satisfactory rather than inadequate in some way. Two out of five people lack a proper job I always cook a proper evening meal
(Often referred to as "the propers") "The Proper of the Church Year includes the appointed
appropriate for a condition or occasion; "everything in its proper place"; "the right man for the job"; "she is not suitable for the position" marked by suitability or rightness or appropriateness; "proper medical treatment"; "proper manners
Pertaining to one of a species, but not common to the whole; not appellative; opposed to common; as, a proper name; Dublin is the proper name of a city
marked by suitability or rightness or appropriateness; "proper medical treatment"; "proper manners"