Thursday Definition

Origin of Thursday

• Middle English from Old English thūres dæg alteration (influenced by Old Norse thōrsdagr Thor's day) of thunres dæg Thor's day (translation of Late Latin Iovis diēs Jupiter's day) thunres genitive of thunor thunder (s)tenə- in Indo-European roots dæg day day

  From American Heritage Dictionary of the English Language, 5th Edition

• Middle English from Old English thūres dæg alteration (influenced by Old Norse thōrsdagr Thor's day) of thunres dæg Thor's day (translation of Late Latin Iovis diēs Jupiter's day) thunres genitive of thunor thunder (s)tenə- in Indo-European roots dæg day day

  From American Heritage Dictionary of the English Language, 5th Edition