senescence senesce • senescent · · · Info · Definitions · Synonyms · Characters · · senescence · · Text Latin · · Script 10 · · Length Definitions · · · (noun) the organic process of growing older and showing the effects of increasing age. Synonyms: aging, ageing. · · Noun Definition 1 (noun) the property characteristic of old age. Synonyms: agedness. · · Noun Definition 2 Synonyms · · · aging · · Synonym 1 ageing · · Synonym 2 agedness · · Synonym 3 Characters · · c latin small letter c U+0063 e latin small letter e U+0065 n latin small letter n U+006E s latin small letter s U+0073