5.3. Odpadek je vsaka snov oziroma predmet v tekočem, plinastem ali trdnem agregatnem stanju neznanega lastnika ali ki ga proizvajalec, lastnik ali imetnik ne more ali ne želi uporabiti sam, ga ne potrebuje, ga moti oziroma mu škodi ali ga je zaradi interesov varstva okolja oziroma drugega javnega interesa treba obdelati, predelati ali odložiti, kot je predpisano.
5.3. Waste is any object or substance in solid, liquid, or gas form which a producer or holder cannot or does not wish to use himself or does not need, which inconveniences or harms him, or which in the interest of environmental protection or other public interest must be processed, transformed, or disposed of according to regulations.