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chron·o·log·i·cal / ˌkränlˈäjikəl/ • adj. relating to the establishment of dates and time sequences: the diary provided a chronological framework for the events. ∎  (of a record of several events) starting with the earliest and following the order in which they occurred: the entries are in chronological order. ∎  calculated in terms of the passage of time rather than some other criterion: ratings are calculated by dividing a child's mental age by his or her chronological age.DERIVATIVES: chron·o·log·i·cal·ly / -ik(ə)lē/ adv.