starost

1. old age
   Želi mirnu starost na selu. — He wants a peaceful old age in the countryside.
   Umrla je u dubokoj starosti. — She died at a very old age.
2. age
   Starost zgrade je oko sto godina. — The building is about a hundred years old.
   Kandidati moraju imati najmanje osamnaest godina starosti. — Candidates must be at least eighteen years of age.

In everyday talk about a person's age, godine is usually used instead: Koliko imaš godina?