Bill Morrison, Australian politician and diplomat, 37th Australian Minister for Defence (died 2013)

William Lawrence Morrison was an Australian politician and diplomat. He was a member of the Australian Labor Party (ALP) and held ministerial office in the Whitlam government as Minister for External Territories (1972–1973), Science (1972–1975), and Defence (1975). He had been a member of the diplomatic service before entering politics, and later served a term as Ambassador to Indonesia (1985–1989).

The minister for defence is the minister of state of the Commonwealth of Australia charged with overseeing the organisation, implementation, and formulation of strategic policy in defence and military matters as the head of the Department of Defence. The minister for defence is responsible for the Australian Defence Organisation, including the Australian Defence Force (ADF). The current defence minister is Richard Marles, who is also concurrently serving as deputy prime minister of Australia, having been selected by Prime Minister Anthony Albanese in May 2022 following the 2022 Australian federal election.