| Meaning | A relatively thin sheetlike expanse or region lying over or under another. |
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| Narrower | asthenosphere | The lower layer of the crust |
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| cell wall | A rigid layer of polysaccharides enclosing the membrane of plant and prokaryotic cells |
| chromosphere | A gaseous layer of the sun's atmosphere (extending from the photosphere to the corona) that is visible during a total eclipse of the sun |
| crust, Earth's crust | The outer layer of the Earth |
| exosphere | The outermost atmospheric layer |
| hydrosphere | The watery layer of the earth's surface |
| lithosphere, geosphere | The solid part of the earth consisting of the crust and outer mantle |
| lower mantle | The deeper part of the mantle |
| mantle | The layer of the earth between the crust and the core |
| mesosphere | The atmospheric layer between the stratosphere and the thermosphere |
| ozone layer, ozonosphere | A layer in the stratosphere (at approximately 20 miles) that contains a concentration of ozone sufficient to block most ultraviolet radiation from the sun |
| snow | A layer of snowflakes (white crystals of frozen water) covering the ground |
| stratosphere | The atmospheric layer between the troposphere and the mesosphere |
| stratum | One of several parallel layers of material arranged one on top of another (such as a layer of tissue or cells in an organism or a layer of sedimentary rock) |
| surface, Earth's surface | The outermost level of the land or sea |
| thermosphere | The atmospheric layer between the mesosphere and the exosphere |
| tropopause | The region of discontinuity between the troposphere and the stratosphere |
| troposphere | The lowest atmospheric layer |
| upper mantle | The upper part of the mantle |
| Broader | region, part | The extended spatial location of something |
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| Spanish | capa, estrato |
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| Catalan | capa, estrat |
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| Verbs | layer | make or form a layer |
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