A career is a person’s chosen profession or occupation [the job that they do to earn a living]. It refers to the series of jobs or positions that a person holds throughout their working life [the time when they are employed].
- A doctor is someone who has chosen a career in medicine (the field of medicine).
- A teacher is someone who has chosen a career in education (the field of teaching).
Very Simple Definition:
A career is the job or work that someone does. It is the job that they choose to do for a long time.
- He hopes to have a long career as adoctor (to work as a doctor for a long time).
- Some people choose teaching (being a teacher) as their career.