Learner's definition of DISCOVERY
1 : the act of finding or learning something for the first time : the act of discovering something
Scientists announced the discovery of a new species of plant.
Her research led to a number of important discoveries about the disease.
Reporters made the shocking discovery that the governor had been unfaithful to his wife.
the discovery of pollution in the river
the discovery of a talented musician
voyages of discovery [=voyages that are done to discover and learn about new places, people, etc.]
sailors during the age of discovery
2 [count] : something seen or learned for the first time : something discovered