bed
noun
2.
a plot of ground in which plants are growing
3.
a depression forming the ground under a body of water
4.
(geology) a stratum of rock (especially sedimentary rock)
5.
a stratum of ore or coal thick enough to be mined with profit
6.
single thickness of usually some homogeneous substance
7.
the flat surface of a printing press on which the type form is laid in the last stage of producing a newspaper or magazine or book etc.
8.
a foundation of earth or rock supporting a road or railroad track