pozdravljati

1. to greet; to say hello
   Komšija me uvek ljubazno pozdravlja. — My neighbor always greets me politely.
   Zašto me više ne pozdravljaš? — Why don't you say hello to me anymore?
2. (through someone, in writing) to send regards; to say hi
   Mama te mnogo pozdravlja. — Mom says hi and sends her love.
   Pozdravljam sve prijatelje iz Novog Sada! — Greetings to all my friends from Novi Sad!
3. (of a decision, idea) to welcome; to approve of
   Građani pozdravljaju odluku o novom parku. — Residents welcome the decision on the new park.
4. (with applause, shouts) to cheer; to acclaim
   Navijači su pozdravljali igrače gromoglasnim aplauzom. — The fans were cheering the players with thunderous applause.
5. (pozdravljati se) to greet each other; to say goodbye
   Dugo su se pozdravljali ispred zgrade. — They spent a long time saying goodbye outside the building.
   Mi se više i ne pozdravljamo. — We don't even say hello to each other anymore.

Takes the accusative (pozdravljati koga); "pozdravi ga" means "say hi to him for me".