1. noun /ˈwɛdənzdeɪ,ˈwɛnzdeɪ,ˈwɛdənzdi,ˈwɛnzdi,ˈwɛnzdeɪ,ˈwɛnzdi/
a) The fourth day of the week in many religious traditions, and the third day of the week in systems using the ISO 8601 norm; it follows Tuesday and precedes Thursday. <!probably just an attributive use of the noun:
b) An appointment, person, or feeling associated with this day of the week.
Syn: Humpday
2. adverb /ˈwɛdənzdeɪ,ˈwɛnzdeɪ,ˈwɛdənzdi,ˈwɛnzdi,ˈwɛnzdeɪ,ˈwɛnzdi/
on Wednesday
Wikipedia foundation.