friday
n. C / Un. the day of the week that comes after Thursday and before Saturday. For many people, it is the last day of the work week.
n. the sixth day of the week, positioned between Thursday and Saturday. Often used as a temporal marker for the conclusion of the standard business week.
We usually go out for dinner on Friday.
The office atmosphere is always more relaxed on Friday because everyone is looking forward to the weekend.
While the traditional work week concludes on Friday, many service industries experience their highest volume of customer traffic as the weekend begins.
From Middle English Friday, from Old English frīġedæġ. Compound of Frīġ and dæġ (“day”), from Proto-West Germanic *Frījā dag, a calque of Latin diēs Veneris, via an association (interpretātiō germānica) of the goddess Frigg with the Roman goddess of love Venus. See also friend. Compare West Frisian freed, German Low German Freedag, Friedag, Dutch vrijdag, German Freitag, Danish fredag. Old Norse Frigg (genitive Friggjar), Old Saxon Fri, and Old English Frīġ are derived from Proto-Germanic *Frijjō. Frigg is cognate with Sanskrit प्रिया (priyā́, “wife”). The root also appears in Old Saxon fri (“beloved lady”); in Swedish fria, in Danish and Norwegian as fri (“to propose for marriage”); a related meaning exists in Icelandic as frjá (“to love”) and similarly in Dutch vrijen (“to make love (to have sex)”). Compare Japanese 金曜日.
When used to describe a recurring event, it is often pluralized ('on Fridays').
I will see you in FridayI will see you on FridayDays of the week require the preposition 'on' rather than 'in'.