Pope Benedict XVI issued his Motu Proprio SUMMORUM PONTIFICUM in 2007 spelling out the Ordinary and Extraordinary Forms of the Latin rite (emphasis mine):
The Roman Missal promulgated by Paul VI is the ordinary expression of the “Lex orandi” (Law of prayer) of the Catholic Church of the Latin rite. Nonetheless, the Roman Missal promulgated by St. Pius V and reissued by Bl. John XXIII is to be considered as an extraordinary expression of that same “Lex orandi,” and must be given due honor for its venerable and ancient usage. These two expressions of the Church’s Lex orandi will in no any way lead to a division in the Church’s “Lex credendi” (Law of belief). They are, in fact, two usages of the one Roman rite.
It is, therefore, permissible to celebrate the Sacrifice of the Mass following the typical edition of the Roman Missal promulgated by Bl. John XXIII in 1962 and never abrogated, as an extraordinary form of the Liturgy of the Church.
I have pondered the words “Ordinary” and “Extraordinary” in the Church’s context for a while. In the English language the definition of “Ordinary” and “Extraordinary” are almost opposite in the current American common usage of the words compared to the Church’s meaning.
In my 1959 Webster New International Second Unabridged Edition, I find these definitions:
Ordinary: 1) Belonging to what is usual; having or taking its place according to customary occurrence or procedure; usual; normal.
3) Of common rank, quality, or ability; not distinguished by superior excellence or beauty; hence not distinguished in any way; commonplace; inferior, of little merit.
Extraordinary: 1) Beyond or out of the common order or method; not usual, customary, regular, or ordinary.
3) Exceeding the common degree, measure or condition; hence, uncommon; remarkable.
In doing web searches of definitions, the primary definition is now #3 and not 1. But in the Church’s sense, Ordinary and Extraordinary use definition #1. Ordinary is the Customary, and Extraordinary means the Not Usual. We use the same sense of “Ordinary” for the Liturgical Season “Ordinary Time”.
I bring this up because I was reading a booklet written in 1949 entitled Towards A Christian Sunday: An Apostolic Program, published by Grailville. In the Introduction by Very Reverend Martin Hellriegel, there is the usage of Ordinary and Extraordinary, just as the Church uses the words. I have never seen this usage in context, so I thought I would share an excerpt:
Unfortunately the Sunday highmass –and ‘highmass’ is the ‘ordinary, ideal form’ of celebrating the Holy Eucharist– is disappearing more and more. What a pity! The great parish solemnity, in which God’s family, with Christ the elder Brother, is to render to the majesty of God the Father all honor and glory, by holy word and sacred song in Christian fellowship, is disappearing! The ‘low’ Mass on the ‘high’ day of the Lord! By the way, the first Mass in the Cenacle was a highmass. “Do this in commemoration of me!“ The low Mass will ever remain the Extraordinary and less ideal form of celebrating the Holy Eucharist.
Msgr. Hellriegel is referring to the high and low Masses of the Latin Rite before Vatican II. His talk was on The Lord’s Day, and if you want to read it in its entirety, see The Lord’s Day by Hellriegel
I just enjoyed seeing the proper (or Church’s) usage of the words “Ordinary” and “Extraordinary” in a different context, so I thought I would share!