SANCTUS Meaning of SANCTUS in English Sanc ‧ tus, the /ˈsæŋktəs/ BrE AmE a prayer or ↑ hymn (=song of praise to God) which is said or sung as part of the ↑ mass in Christian churches Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012