In a ceremonious manner.

A ritual, with religious or cultural significance. / An official gathering to celebrate, commemorate, or otherwise mark some event.

plural of ceremony

The state of being ceremonious.

Fond of ceremony, ritual or strict etiquette; punctilious / Characterized by ceremony or rigid formality

plural of ceremonial

Of, relating to, or used in a ceremony. / (archaic) Observant of ceremony, ritual, or social forms.

A ceremony, or series of ceremonies, prescribed by ritual.

To celebrate in a ceremonial way.

In a ceremonial manner.