This is the 13143rd most frequent Polish word.
oficjaln
The word "oficjaln" seems incomplete or misspelled; the correct Polish word is likely "oficjalny," which means "official" in English.
Here 'oficjalne' is used as an adjective describing the nature of the meeting, indicating that it was formal.
Spotkanie było bardzo oficjalne i pełne grzeczności.
The meeting was very formal and full of politeness.
The word 'oficjalny' is used as an adjective to describe the result, meaning it is recognized or authorized.
Ogłoszono oficjalny wynik wyborów.
The official result of the election was announced.
In this context, 'oficjalne' describes the invitation, indicating that it is formal and authorized.