Primer

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.

Any of various similar works issued in England for private prayer in accordance with the Book of Common Prayer.

Any substance or device, such as priming wire or blasting cap, used to ignite gunpowder or other explosive.

First in time, initial, early.

First in importance, premier.

First in position, foremost.

A surname.