Getting on in years is a term used to describe the process of AGING. The crossword solutions for this term are OLD (3 letters), ELDERLY (7 letters), oldish (6 letters), SENESCENT (9 letters), AGING (5 letters), AGED (4 letters), and becomingold (11 letters). OLD refers to having lived for a long time, while ELDERLY implies advanced age. Oldish is a less formal way of saying OLD, while SENESCENT is a more scientific term for AGING. AGING is the process of growing older, while AGED is a more specific term for having reached a certain age. Becomingold is a phrase used to describe the process of getting older.