lom

1. (of objects) breakage; breaking
   Osiguranje pokriva i lom stakla. — The insurance also covers glass breakage.
2. (of a bone) fracture
   Doktor je na snimku video lom kosti. — The doctor saw a bone fracture on the X-ray.
3. colloq. (often napraviti lom) ruckus; uproar; scene
   Komšije su sinoć napravile pravi lom. — The neighbours kicked up a real ruckus last night.
   Ako ne dobije šta hoće, napraviće lom. — If he doesn't get what he wants, he'll make a scene.
4. (in physics) refraction
   Duga nastaje zbog loma svetlosti u kapima kiše. — A rainbow forms because of light refraction in raindrops.
5. colloq. (of a party, event) a blast; something awesome; wild
   Žurka je sinoć bila lom! — Last night's party was a blast!

For a broken bone and for refraction of light, the usual Serbian terms are «prelom kosti» (both in everyday and medical language) and «prelamanje svetlosti» (in physics, cf. indeks prelamanja); «lom» also occurs in these meanings.