litter

waste, garbage, rubbish, litter, debris, junk

这些名词均含“废物，垃圾”之意。
waste: 普通用词，概念广泛，指任何被丢弃的东西。
garbage: 主要指有机废料，包括厨房的剩菜剩饭或不能再用的食物。也可作引申用。
rubbish: 普通用词，指任何成堆的、破损的、用过的或无用的东西，尤指弃掉的垃圾堆。也可作引申用。
litter: 是四下乱丢物品的总称，尤指散落于地，有碍观瞻的废物。
debris: 着重指分解、分裂或破坏后剩下的碎片，也指零散的普通废品。
junk: 指回收的旧汽车或大型机器，也指毫无实用价值，或破烂物体，但不指垃圾。

名词 litter:

1. the offspring at one birth of a multiparous mammal
2. rubbish carelessly dropped or left about (especially in public places)
3. conveyance consisting of a chair or bed carried on two poles by bearers
4. material used to provide a bed for animals
   同义词：bedding material, bedding

动词 litter:

1. strew
2. make a place messy by strewing garbage around
3. give birth to a litter of animals

1. There were piles of litter in the streets.
   街道上垃圾成堆。
2. He was fined for littering on the sidewalks.
   他因在人行横道上乱扔杂物而被罚款。
3. Our cat has a litter of four kittens.
   我们家的猫一窝养了4只小猫。

lit.ter

n.（名词）

A disorderly accumulation of objects; a pile.
杂物：物品胡乱的堆积；一堆杂物
Carelessly discarded refuse, such as wastepaper:
垃圾：随意弃置的垃圾，如废纸：
例句：
the litter in the streets after a parade.
游行过后街面上的垃圾

The offspring produced at one birth by a multiparous mammal.See Synonyms at flock
幼仔：一胎多子的哺乳动物一胎所产的后代参见 flock

Material, such as straw, used as bedding for animals.
褥草：为动物作床的东西，如稻草
An absorbent material, such as granulated clay, for covering the floor of an animal`s cage or excretory box.
粗沙粒：为动物的笼子或排泄箱铺地的吸收性物质，如颗粒状粘土
An enclosed or curtained couch mounted on shafts and used to carry a single passenger.
轿：架于辕上四周封闭或挂有帘子的睡椅，用于承载单独一个乘客
A flat supporting framework, such as a piece of canvas stretched between parallel shafts, for carrying a disabled or dead person; a stretcher.
担架：一扁平支撑架，如两根平衡杠撑起的一块帐布，用于抬运病人或死人；担架
The uppermost layer of the forest floor consisting chiefly of fallen leaves and other decaying organic matter.
（树林里的）枯枝落叶层：森林地表的最上一层，主要由落叶和其他有机物组成
v.（动词）
lit.tered,lit.ter.ing,lit.ters
v.tr.（及物动词）
To give birth to (a litter).
产（幼仔）
To make untidy by discarding rubbish carelessly:
使杂乱：随意弃置垃圾而导致零乱：
例句：
Selfish picnickers litter the beach with food wrappers.
自私的野餐者乱扔包装纸使海滩杂乱不堪

To scatter about:
乱扔：
例句：
littered towels all over the locker room.
乱扔在更衣室里的毛巾

To supply (animals) with litter for bedding or floor covering.
用草等给（动物）铺窝或垫床
v.intr.（不及物动词）
To give birth to a litter.
产仔
To scatter litter.
乱扔杂物

来源：
Middle English
中古英语
from Anglo-Norman litere
源自 英法语 litere
from Medieval Latin lect3ria influenced by Old French lit [bed]
源自 中世纪拉丁语 lect3ria 受 古法语 lit的影响 [床]
from Latin lectus [bed] * see legh-
源自 拉丁语 lectus [床] *参见 legh-

【引伸】
lit.terer
n.（名词）