Here’s an updated, concise review of the Diccionario de Filosofía by Nicola Abbagnano, focusing on the free Spanish PDF version you’re likely to find online.

El Diccionario de Filosofía

ABBAGNANO, Nicola, Diccionario De Filosofía - Internet Archive

The Diccionario de Filosofía by Nicola Abbagnano is considered one of the most rigorous and influential philosophical reference works of the 20th century. Unlike many dictionaries that focus on biographical data, Abbagnano’s work focuses strictly on ideas and concepts, providing a map of the "possibilities of philosophizing" from ancient Greece to the modern era. Key Features of the Work