diskretan

1. (of a person or behavior) discreet; tactful
   Budi diskretan, niko ne sme da sazna. — Be discreet, nobody can find out.
   Konobar je bio veoma diskretan i ljubazan. — The waiter was very discreet and polite.
2. (of things, style) subtle; understated; unobtrusive
   Nosila je diskretnu šminku i jednostavnu haljinu. — She wore subtle makeup and a simple dress.
   U restoranu svira diskretna muzika. — Unobtrusive music plays in the restaurant.
3. (in mathematics, technology) discrete
   Diskretna matematika je obavezan predmet na prvoj godini. — Discrete mathematics is a required course in the first year.

In everyday speech it almost always means “discreet” or “subtle”, not the mathematical “discrete”.