Definicija: Stroj za zmanjševanje, ki razkosa ali zmelje snov v manjše in bolj enotne delce. Drobljenje je tudi zmanjševanje, brušenje, mletje, drobljenje v prah, granuliranje, lomljenje, krušenje, mečkanje in ribanje.

Definicija: A size-reduction machine which tears or grinds materials to a smaller and more uniform particle size. Shredding process is also called size reduction, grinding, milling, comminution, pulverisation, hogging, granulating, breaking, chipping, crushing, cutting, rasping.