1. (verb)senesce, age, get on, mature, maturate grow old or older Synonyms: get on, age, shape up, progress, bestride, come on, grow, climb on, be on, suppurate, board, come along, senesce, get along, get along with, mount up, get on with, advance, jump on, fester, ripen, mount, maturate, mature, hop on