ad rem \ad REM\, adverb:
1. Without digressing; in a straightforward manner.
1. Relevant; pertinent.
I am sure these things are not ad rem. Some persons think, my lord, it is very hard these men should be forced against their consciences from the church.
-- Richard Baxter, The Practical Works of Richard Baxter
The letter seems free of formulae, which suggests it was composed specifically ad rem.
-- Roger Rees, Layers of Loyalty in Latin Panegyric
Ad rem is a useful Latin phrase that literally means "at thing" from the roots ad and rēs.