Merriam-Webster's Collegiate® Dictionary, 11th Edition
LITTER
I. noun see: lie
Date: 14th century
1. a covered and curtained couch provided with shafts and used for carrying a single passenger, a device (as a stretcher) for carrying a sick or injured person,
2. a. material used as bedding for animals, material used to absorb the urine and feces of animals, the uppermost slightly decayed layer of organic matter on the forest floor, the offspring at one birth of a multiparous animal ,
4. trash, wastepaper, or garbage lying scattered about , an untidy accumulation of objects , littery adjective
II. verb
Date: 14th century
transitive verb bed 1a, to give birth to a litter of (young),
3. to strew with scattered articles, to scatter about in disorder, to lie about in disorder , to mark with objects scattered at random , intransitive verb to give birth to a litter, to strew litter