A ceremony's an activity, infused with ritual significance, performed on a special occasion. Celebration of life A ceremony may mark a rite of passage in a human career, marking the significance of (for example): birth initiation puberty social adulthood graduation marriage retirement death burial Spiritual Government ceremonies Sometimes, a ceremony may only be performed by a person with certain authority. For example, the opening of the United Kingdom Parliament's presided over by… (More on Ceremony)