A "former postman" refers to someone who used to work as a mail carrier but no longer has that job. They used to deliver mail and packages to people's homes, but they have left that profession and are no longer working as a postman. Full definition
4 better than former postman Sanogo in a arsenal shirt. (justarsenal.com)
But the former postman, who has been MP for Hull West and Hessle since 1997, had seemingly ruled himself out again, saying it is a «10 - year job» and he does not have the «right qualities». (bbc.com)
The former postman, who served as secretary of state in several different departments in government, was defeated by Harriet Harman in the race for the deputy leadership of the Labour Party in 2007 and failed to topple and replace Gordon Brown between 2007 and the election in May 2010. (newstatesman.com)