What is the meaning of the word "bed"?

Definitions:

(geology) a stratum of rock (especially sedimentary rock) noun
- they found a bed of sandstone
a depression forming the ground under a body of water noun
- They searched for treasure on the ocean bed.
a foundation of earth or rock supporting a road or railroad track noun
- the track bed had washed away
a piece of furniture that provides a place to sleep noun
- They sat on the edge of the bed.
a plot of ground in which plants are growing noun
- the gardener planted a bed of roses
a stratum of ore or coal thick enough to be mined with profit noun
- The company stripped the top of the mountain off to expose coal beds.
single thickness of usually some homogeneous substance noun
- slices of hardboiled egg on a bed of spinach
to furnish with a bed verb
- The inn keeper could bed all the new arrivals.
to have sexual intercourse with verb
- I bedded them after dinner.
to place plants in a prepared bed of soil verb
- I spent last Saturday bedding flowers.
to put to bed verb
- The children were bedded at ten o'clock.