of or concerned with the study of changes occurring over a period of time, as in language, mores, etc.
Origin of diachronicdia- + chronic
Of or concerned with phenomena, such as linguistic features, as they change through time.
Origin of diachronicFrom dia- Greek khronos time
(comparative more diachronic, superlative most diachronic)
- Occurring over or changing with time.
- Of, pertaining to or concerned with changes that occur over time.
From dia- + chronic.