achiever(someone who is successful because they are determined and work hard: high/low achiever (=someone who is extremely successful/not very successful in life):*Christopher came from a comfortable family of upper-middle-class achievers.: Bob’s not what you would call one of life’s high achievers. MED. • I guess it was clear to everyone that I was bright and an achiever. compare: underachiever, overachiever. LDOCEAlexander Demidov)
