(1813-73) a Scottish missionary (=someone who goes to a foreign country to teach people about Christianity) and explorer of Africa. He was the first European to see the Zambezi River and the Victoria Falls. A journalist called Henry Morton Stanley, who did not know Livingstone, went to look for him. When they met he said, "Dr Livingstone, I presume". People sometimes say this as a joke when they meet someone.
Definition from the Longman Dictionary of Contemporary English Advanced Learner's Dictionary.
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