| Breviary | Manuscript containing texts for use in the Divine Office |
| Divine Office | Eight liturgical sequences observed daily by monks, nuns, and some lay individuals, consisting primarily of the recitation of Psalms, supplemented with hymns and prayers |
| Just war theory | Any attempt to define the circumstances under which one may justifiably engage in war |
| Pharisaism | Social, political, and religious movement in ancient Judea; its influence on 2 Maccabees is visible in its mention of a resurrection of the dead at the end of time, which helps this text’s compatibility with Christian doctrine |
| Pericope | Gospel reading in Mass on which the sermon is based |
| Lectionary | Manuscript containing texts used in Mass or Office |
| Missal | Manuscript containing texts used in Mass |
| Monstrance | Reliquary designed to display the contained relic; also, vessel for the display of the consecrated host |
| Pericope | Gospel reading in Mass on which the sermon is based |
| Primary relic | Part of a saint’s bodily remains |
| Reliquary | Relic holder |
| Sanctorale | That part of the liturgical calendar containing saints’ days, but not the moveable feasts |
| Secondary relic | Anything that belonged to, or came into contact with, a saint during their lifetime, e.g. textile from their clothing |
| Temporale | That part of the liturgical calendar containing the movable feasts, running at least from Lent until Pentecost |
| Tertiary relic | An object that has touched a primary or secondary relic |
| Three estates | The notion that society is (divinely) divided into three occupational classes: those who pray (oratores), those who fight (bellatores), and those who labour (laboratores) |
| Translation | The transfer of a saint’s remains to a prominent location following their canonization |