Origin of ThursdayMiddle English Thoresdai, Thunres dai from Old English Thunres dæg, Old Norse Thorsdagr, Thor's day, rendering Late Latin Jovis dies
nounAbbr. Thurs. or Thur. or Thu. or Th or T
Origin of ThursdayMiddle 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 ; see (s)tenə- in Indo-European roots. dæg day ; see day .