1
- mass noun rubbish, such as paper, tins, and bottles, that is left lying in an open or public place（在公共场所乱扔的）废物, 垃圾：
fines for dropping litter.
对乱扔垃圾的罚款。
1.1
- in sing. an untidy collection of things lying about一堆杂乱的东西：
a litter of sleeping bags on the floor.
地板上一堆凌乱的睡袋。
2
- a number of young animals born to an animal at one time一窝（仔畜）：
a litter of five kittens.
一窝五只小猫。
3
- mass noun material forming a bedding or carpet, in particular（用作床垫或地毯的）铺垫物, 尤指：
3.1
- （亦作cat litter）granular absorbent material lining a tray where a cat can urinate and defecate when indoors猫沙（指猫在室内大、小便用的便盆内衬材料, 为颗粒状吸湿性物质）。
3.2
- straw or other plant matter used as bedding for animals（供动物睡眠用的）褥草。
3.3
- （亦作leaf litter）decomposing but recognizable leaves and other debris forming a layer on top of the soil, especially in forests（尤指森林土壤的）枯枝落叶层。
4
- historical a vehicle containing a bed or seat enclosed by curtains and carried on men's shoulders or by animals〈史〉（有床或座的）车, 轿。
4.1
- a framework with a couch for transporting the sick and wounded担架。
with obj.
1
- make (a place) untidy with rubbish or a large number of objects left lying about乱扔（废物, 垃圾）：
clothes and newspapers littered the floor.
地上乱扔着衣服和报纸。
1.1
- with obj. and adverbial（一般作be littered）leave (rubbish or a number of objects) lying untidily in a place乱扔（垃圾或杂物）：
there was broken glass littered about.
碎玻璃被乱丢在那儿。
1.2
- （一般作be littered with）figurative fill (a text, history, etc.) with examples of something unpleasant〈喻〉在（文章, 历史）中充斥, 塞满（不良事物）：
news pages have been littered with doom and gloom about company collapses.
新闻版面上充斥着公司倒闭的不祥消息。
2
- archaic provide (a horse or other animal) with litter as bedding〈古〉（为马或其他动物）铺褥草。
词源
Middle English (in sense 4 of the noun)： from Old French litiere, from medieval Latin lectaria, from Latin lectus 'bed'. Sense 1 dates from the mid 18th cent.