Definition of litters:
(n) :
(uncountable) Waste or debris, originally any mess but now particularly trash left or thrown on the ground.
(v) :
(intransitive) To drop or throw trash without properly disposing of it (as discarding in public areas rather than trash receptacles).
(v) :
(transitive) To scatter carelessly about.
(v) :
(transitive) To strew (a place) with scattered articles.
(n) :
(uncountable) Straw, grass, and similar loose material used as bedding for people or animals.
(n) :
(uncountable) Animal bedding together with its dung.