definition of
subsidence

[1] #1 subsidence n. [remission, remittal] an abatement in intensity or degree (as in the manifestations of a disease); "his cancer is in remission". wn

[2] #2 subsidence n. [settling, subsiding] a gradual sinking to a lower level. wn

[3] #3 subsidence n. [cave in] the sudden collapse of something into a hollow beneath it. wn