noun
1. a symptom of reduced quality or strength (Freq. 1)
• Syn: ↑impairment
• Derivationally related forms: ↑deteriorate
• Hypernyms: ↑decay
• Hyponyms: ↑corrosion, ↑devastation, ↑desolation, ↑decrepitude, ↑dilapidation, ↑wear
2. process of changing to an inferior state
• Syn: ↑decline in quality, ↑declension, ↑worsening
• Derivationally related forms: ↑worsen (for: ↑worsening), ↑decline (for: ↑declension), ↑deteriorate
• Hypernyms: ↑decline, ↑diminution
• Hyponyms: ↑slump, ↑slack, ↑drop-off, ↑falloff, ↑falling off
Useful english dictionary. 2012.