jednosmeran

1. (of a street, ticket) one-way
   Ova ulica je jednosmerna, ne možeš skrenuti levo. — This is a one-way street, you can't turn left.
   Kupio sam jednosmernu kartu za Beč. — I bought a one-way ticket to Vienna.
2. (of relations, communication) one-sided; one-way
   Njihovo prijateljstvo je postalo jednosmerno. — Their friendship has become one-sided.
3. (of current) direct
   Baterija daje jednosmernu struju. — A battery produces direct current.

Direct current is jednosmerna struja; alternating current is naizmenična struja.