Friday /ˈfɹaɪ.deɪ/noun 2adverb 1forms 1 noun2 •the day of the week between Thursday and Saturday •(informal) The last workday in a work schedule that is not Monday through Friday.Tomorrow's Thursday, but I have Friday and Saturday off, so really it's my Friday. adverb1 •(US, Canada) On Friday. formsFridays