Meaning : A formal event performed on a special occasion.
Example :
A ceremony commemorating Pearl Harbor.
Synonyms : ceremonial, ceremonial occasion, observance
Meaning : Any activity that is performed in an especially solemn elaborate or formal way.
Example :
The ceremony of smelling the cork and tasting the wine.
He makes a ceremony of addressing his golf ball.
He disposed of it without ceremony.
Meaning : The proper or conventional behavior on some solemn occasion.
Example :
An inaugural ceremony.