advancing
From Longman Dictionary of Contemporary Englishadvancingad‧vanc‧ing /ədˈvɑːnsɪŋ $ ədˈvæn-/ adjective → advancing years/ageExamples from the Corpusadvancing• There, when animals are on the move, there is little social structure, merely a mass of advancing animals.• These symptoms are often the first evidence of advancing arterial disease.