careerist /kəˈɹɪɹɪst/noun 2adjective 1forms 3 noun2 •(disapproving) A person who pursues the advancement of their career at the expense of other values.A careerist is a square-filler, a time-server. His talents and imagination have been circumscribed to perform managerial duties. — 1980 •A person who takes a job, especially in the military, for a long time rather than temporarily. adjective1 •Of or pertaining to such a person or way of life formscareerists · more careerist · most careerist