Definition of: subsidence

(səb·sīd′ns, sub′sə·dəns) noun
1. The settling of heavy parts to the bottom; precipitation.
2. The sinking of water or other liquids to a lower or usual level: subsidence of a flood.
3. A gradual settling into a quiet or inactive state.
4. A gradual settling of the earth to a lower level, because of ground movements or underground workings. [<L subsidentia sediment <subsidere SUBSIDE]