Definitions

1. noun

an ancient Greek philosopher who developed an atomic theory of matter and was one of the founders of the school of atomism

“Democritus’ atomic theory was well ahead of its time and influenced later philosophers and scientists.”

2. proper noun

a philosopher from ancient Greece, born in Abdera, Thrace, around 460 BC

“The ancient Greek philosopher Democritus is best known for his atomic theory and his teachings on the nature of reality.”