rečenica

1. sentence
   Napiši pet rečenica na srpskom. — Write five sentences in Serbian.
   Ova rečenica mi nije jasna. — I don't understand this sentence.
2. remark; words
   Njegova poslednja rečenica me je iznenadila. — His last remark surprised me.

In legal contexts, sentence means kazna (punishment), or presuda when referring to the court's judgment; never rečenica.