iconic
Very famous and easily recognized as a powerful symbol.
Iconic means instantly recognizable and representing something important or memorable. The Statue of Liberty is iconic: when people see her torch and crown, they immediately think of America and freedom. Mickey Mouse's round ears are iconic: you can recognize them from just a silhouette.
Something becomes iconic when it captures people's imagination so powerfully that it turns into a symbol. The Golden Gate Bridge is an iconic landmark of San Francisco. The opening notes of Beethoven's Fifth Symphony are iconic: even people who don't listen to classical music recognize those four famous notes.
When something is iconic, it has moved beyond just being good or popular. It represents an entire idea, era, or feeling. Neil Armstrong's photograph of Buzz Aldrin on the moon is iconic because it captures the achievement of the first moon landing. A movie can have an iconic scene that everyone remembers and quotes. An athlete might strike an iconic pose that becomes famous.
Not everything famous is iconic, though. Something truly iconic endures: it remains meaningful and recognizable across generations, becoming part of our shared cultural memory.