primena

1. application; use
   Ovaj lek ima široku primenu. — This medicine has a wide range of uses.
   Znanje je važno samo ako ima primenu. — Knowledge matters only if it can be applied.
2. (of laws, rules) application; enforcement
   Primena novog zakona počinje od januara. — The new law will apply from January.

Usually followed by the genitive: primena zakona; "u primeni" means "in use, in force".