praksa

1. (as opposed to theory) practice
   U teoriji je lako, ali u praksi je drugačije. — It's easy in theory, but different in practice.
2. (of students, trainees) internship; work placement
   Leto ću provesti na praksi u banci. — I'm spending the summer on an internship at a bank.
   Studenti imaju obaveznu praksu na trećoj godini. — Students have a compulsory placement in their third year.
3. practice; custom
   To je uobičajena praksa u našoj firmi. — That's common practice in our company.
4. experience
   Za ovaj posao potrebne su bar dve godine prakse. — This job requires at least two years of experience.
5. (of a doctor or lawyer) practice
   Otvorio je privatnu stomatološku praksu. — He opened a private dental practice.

'To do an internship' is usually biti na praksi or raditi praksu.