"Former minister" refers to a person who held a position of power within the government in the past but is no longer serving in that role. Full definition
For us as former ministers, we wish him speedy recovery. (punchng.com)
Others rejected that completely: the «in the know» MPs tended to be former ministers who'd been there and done that. (politics.co.uk)
A number of officials, including former ministers, are on trial for allegedly compromising the 2015 elections with the sum of $ 115 million. (punchng.com)