1. (verb)hop on, mount, mount up, get on, jump on, climb on, bestride get up on the back of Synonyms: get on, age, shape up, maturate, progress, bestride, come on, get along, climb on, be on, wax, board, come along, put on, senesce, go up, get along with, mount up, get on with, advance, climb up, ride, rise, jump on, mature, hop on, climb, mount