n. 25B6; verb
six aircraft jettisoned their loads : DUMP, drop, ditch, discharge, throw out, tip out, unload, throw overboard.
he jettisoned his unwanted papers 007C; the scheme was jettisoned : DISCARD, dispose of, throw away/out, get rid of; reject, scrap, axe, abandon, drop; informal chuck (away/out), dump, ditch, bin, junk, get shut of; Brit. informal get shot of; N. Amer. informal trash.
retain.