Any substance or device, such as priming wire or blasting cap, used to ignite gunpowder or other explosive. / (obsolete, rare) A person who primes explosives.

(historical, Catholicism ecclesiastical) A prayer or devotional book intended for laity, initially an abridgment of the breviary and manual including the hours of the Virgin Mary, 15 gradual and 7 penitential psalms, the litany, the placebo and dirige forming the office of the dead, and the commendations.

(obsolete) First in time, initial, early. / (obsolete) First in importance, premier. / (obsolete, rare) First in position, foremost.

plural of primer

A surname.

plural of Primer

(printing, dated) The size of type between bourgeois and small pica, standardized as 10-point.

(printing, historical) The size of type between English and paragon, standardized as 18-point, used in the printing of large-format English bibles.

Synonym of detonating cord

(printing, US, dated) The size of type between double English and meridian, standardized as 36-point.