1. noun /ˈθɜːzdeɪ,ˈθɜːzdi,ˈθɝzdeɪ,ˈθɝzdi/
a) The fifth day of the week in many religious traditions, and the fourth day of the week in systems using the ISO 8601 norm; it follows Wednesday and precedes Friday. <! probably just an attributive use of the noun:
b) An appointment, person, or feeling associated with this day of the week.
2. adverb /ˈθɜːzdeɪ,ˈθɜːzdi,ˈθɝzdeɪ,ˈθɝzdi/
on Thursday
Wikipedia foundation.