An Ornament

1. An element of decoration; that which embellishes or adorns. quotations Synonyms: decoration
2. A Christmas tree decoration.
3. (music) A musical flourish that is unnecessary to the overall melodic or harmonic line, but serves to decorate that line.
4. (Christianity, in the plural) The articles used in church services.
5. (biology) A characteristic that has a decorative function (typically in order to attract a mate)