Meaning

1. bed, base, foundation, substratum, underlayer (layer underneath another) [with pod (+ accusative) ‘to under what’],
2. primer, undercoat (coat of paint or other material applied onto a surface before that of a topcoat)
3. foundation (cosmetic cream roughly skin-colored, designed to make the face appear uniform in color and texture)
4. railroad tie, railway sleeper
5. background music (music in a film, video game or other medium that establishes mood and is not meant to have the audience's focus)
6. (slang) beat (instrumental portion of a piece of hip-hop music)
7. rootstock
8. (obsolete) layer of manure in a cold frame upon which one spreads soil
9. (obsolete) first ploughing
10. (obsolete) map or graph used to ease the placement of elements on a map
11. (obsolete) cushion, soft pad, pillow
12. (obsolete) tree stamped for a beehive
13. shabrack
14. iron stand used to stack wood in a hearth
15. base of a watermill