1
- a sheet, quantity, or thickness of material, typically one of several, covering a surface or body层, 覆盖层, 涂层：
arrange a layer of aubergines in a dish
在碟子上铺一层茄子片
figurative 〈喻〉the structure of deception takes on another layer.
骗局的设计又增加了一项内容。
1.1
- a level of seniority in the hierarchy of an organization（机构的）上层（人员）：
a managerial layer.
管理层。
2
- in combination a person or thing that lays something摆放者, 铺设者; 产卵者：
the worms are prolific egg-layers.
这种蠕虫大量产卵。
2.1
- a hen that lays eggs产蛋的鸡。
3
- a shoot fastened down to take root while attached to the parent plant压条（植物嫁接时从母体上下接生根的嫩枝）。
with obj. ［often as adj. layered］
1
- arrange in a layer or layers分层：
the current trend for layered clothes.
分层服装的流行趋势。
1.1
- cut (hair) in overlapping layers将（头发）剪出分层式发型：
her layered, shoulder-length hair.
她的分层披肩长发。
2
- propagate (a plant) as a layer用压条培育（植物）：
a layered shoot.
压条枝。
词源
Middle English (denoting a mason)： from LAY1 + -ER1 . The sense 'stratum of material covering a surface' （early 17th cent.） may represent a respelling of an obsolete agricultural use of LAIR1 denoting quality of soil.