from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A hymn of praise sung at the end of the Preface in many Eucharistic liturgies.
- n. A hymn of praise that is the last item of the Preface of the Ordinary of the Roman Catholic Mass.
- n. A musical setting for either of these hymns of praise.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- proper n. A hymn from Christian liturgy, loosely related to the Trisagion.
from the GNU version of the Collaborative International Dictionary of English
- n. A part of the Mass, or, in Protestant churches, a part of the communion service, of which the first words in Latin are Sanctus, sanctus, sanctus [Holy, holy, holy]; -- called also Tersanctus.
- n. An anthem composed for these words.
from The Century Dictionary and Cyclopedia
- n. In liturgics, the ascription “Holy, holy, holy, Lord God of hosts, …” in which the eucharistic preface culminates, and which leads up to the canon or prayer of consecration.
- n. A musical setting of the above ascription or hymn.
Middle English, from Late Latin Sānctus, from Latin sānctus, holy (from the first word of the hymn); see sanctify.(American Heritage® Dictionary of the English Language, Fourth Edition)
Latin sanctus (Wiktionary)