1. The study of linguistic or historical phenomena across different time periods; the analysis of how language or events change over time
Diachrony examines how the English language has evolved from Old English to Modern English.
A diacronia examina como a língua portuguesa evoluiu desde o português medieval até ao português moderno.
2. In linguistics, the approach that studies language development and change historically
Diachronic linguistics focuses on language change rather than language at a single point in time.
A linguística diacrónica concentra-se na mudança linguística em vez de estudar a língua num único ponto no tempo.