1. [syn: as needed, as required, pro re nata, PRN]
The Collaborative International Dictionary of English v.0.48:
Pro \Pro\, prep. [L.; akin to prae before, Gr. ?, and E. for.
See For, prep., and cf. Prior, a.]
A Latin preposition signifying for, before, forth.
Pro confesso [L.] (Law), taken as confessed. The action of
a court of equity on that portion of the pleading in a
particular case which the pleading on the other side does
Pro rata. [L. See Prorate.] In proportion; proportion.
Pro re nata [L.] (Law), for the existing occasion; as
WordNet (r) 3.0 (2006):
pro re nata
adv 1: according to need (physicians use PRN in writing
prescriptions); "add water as needed" [syn: as needed,
as required, pro re nata, PRN]
Bouvier's Law Dictionary, Revised 6th Ed (1856):
PRO RE NATA. For the occasion as it may arise.