Read the dictionary definition of litter. All definitions for this word.
1. material used to provide a bed for animals
2. conveyance consisting of a chair or bed carried on two poles by bearers
3. the offspring at one birth of a multiparous mammal
4. rubbish carelessly dropped or left about (especially in public places)
5. give birth to a litter of animals
6. make a place messy by strewing garbage around
7. strew
1. Cigar butts littered the ground