WordWeb Online

1. The inflection of nouns and pronouns and adjectives in Indo-European languages
    
2. Process of changing to an inferior state
   - deterioration, decline in quality, worsening
    
3. A downward slope or bend
   - descent, declivity, fall, decline, declination, downslope
    
4. A class of nouns, pronouns or adjectives in Indo-European languages having the same (or very similar) inflectional forms
   "the first declension in Latin"

Derived forms: declensions

Type of: category, class, decline, diminution, family, incline, inflection, inflexion [Brit], side, slope

Encyclopedia: Declension