land ‧ mark /ˈlændmɑːk $ -mɑːrk/ BrE AmE noun [countable]
1 . something that is easy to recognize, such as a tall tree or building, and that helps you know where you are:
One of Belfast’s most famous landmarks, the Grosvenor Hall, has been demolished.
2 . one of the most important events, changes, or discoveries that influences someone or something:
The discovery of penicillin was a landmark in the history of medicine.
landmark decision/case/ruling
The Supreme Court issued a landmark decision in January 2001.
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COLLOCATIONS
■ ADJECTIVES/NOUN + landmark
▪ a famous/well-known landmark
The Eiffel Tower is probably the most famous landmark in Paris.
▪ a historic landmark
Rome is crammed with historic landmarks such as the Colosseum.
▪ a prominent landmark (=one that is very noticeable)
The castle sits on a hill above the town and is a prominent landmark.
▪ a familiar landmark
It was so dark we could not see any familiar landmarks.
▪ a local landmark
This oddly shaped rock is a well-known local landmark.
▪ a major/significant landmark (=an important one)
From Parliament Hill, you can see most of London's major landmarks.
▪ a London/New York/Paris etc landmark
Buckingham Palace is a London Landmark.