A parade (also called march or marchpast) is a procession of people, usually organized along a street, often in costume, and often accompanied by marching bands, floats or sometimes large balloons. Parades are held for a wide range of reasons, but are usually celebrations of some kind. In Britain the term parade is usually reserved for either military parades or other occasions where participants march in formation; for celebratory occasions the word procession is more usual. In the Canadian Forces the term also has several less formal connotations.[1]
Protest demonstrations also sometimes take the form of a parade, but in such cases are usually referred to as a march instead.
http://en.wikipedia.org/wiki/Parade
花车游行