Pronunciation: [hˈa͡ɪ mˈas] (IPA) 
The phrase "high mass" is commonly used in the context of Catholicism to refer to a ceremonial mass with extra liturgical elements. The spelling of "high" is fairly straightforward, using the sounds /haɪ/ for the first syllable, and /h/ for the second. "Mass" is spelled using the sounds /mæs/ for the first syllable, and /s/ for the second. Together, the phrase is spelled as /haɪ mæs/, with the stress on the first syllable.
High Mass refers to a solemn and elaborate form of the Roman Catholic Mass, primarily celebrated with full ceremonial liturgical elements. It is often associated with the Latin or Tridentine Mass, which was the standard form of the liturgy prior to the Second Vatican Council. High Mass is distinguished by its use of incense, Gregorian chants, and multiple ministers and servers, creating a reverential and grand atmosphere.
During High Mass, the priest dons ornate liturgical vestments and celebrates the Eucharistic liturgy accompanied by a deacon and subdeacon. The Mass includes a greater number of rites and rituals than a Low Mass, such as the Asperges (sprinkling of holy water), the Last Gospel, and the distribution of Communion under both species. The intricate and symbolic movements of the priest and servers, as well as the choir's participation, contribute to the magnificence of the High Mass.
High Mass is known for its emphasis on the visual and auditory elements of worship, creating a multisensory experience aimed at evoking a sense of awe and reverence among the congregation. It is often celebrated on special occasions and feasts, as well as in cathedrals or churches with a strong liturgical tradition.
Overall, High Mass represents a ceremonial and elaborate form of the Roman Catholic Mass, embodying a rich history and beauty in its liturgical expressions.
Mass on great occasions, and in a specially formal and solemn manner.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.
The term "high mass" has its origin in the Latin word "Missa", meaning "dismissal" or "sending forth". In early Christianity, the Eucharistic liturgy was divided into two parts: the "Mass of the Catechumens" for those in the process of conversion, and the "Mass of the Faithful" for the baptized believers. Over time, the latter part became the predominant focus, and the term "high mass" emerged as the designation for the more elaborate and solemn celebration of the Eucharist. It was often characterized by the presence of the entire clergy, incense, intricate ceremonies, and choral music.
