- deterioration, impairment - a symptom of reduced quality or strength
--1 is a kind of decay
--1 has particulars:corrosion; devastation, desolation; decrepitude, dilapidation; wear Derived forms: verb deteriorate1, verb deteriorate2 - deterioration, decline in quality, declension, worsening - process of changing to an inferior state
--2 is a kind of decline, diminution
--2 has particulars: slump, slack, drop-off, falloff, falling offDerived forms: verb deteriorate1, verb deteriorate2