Botany Bay

WordReference Random House Unabridged Dictionary of American English © 2025

Bot′any Bay′, 

1. Place Names a bay on the SE coast of Australia, near Sydney: site of early British penal colony.

Collins Concise English Dictionary © HarperCollins Publishers::

Botany Bay noun

1. an inlet of the Tasman Sea, on the SE coast of Australia: surrounded by the suburbs of Sydney
2. (in the 19th century) a British penal settlement that was in fact at Port Jackson, New South Wales