n.1 the process or art of decorating.
2 a thing that decorates or serves as an ornament.
3 a medal etc. conferred and worn as an honour.
4 (in pl.) flags etc. put up on an occasion of public celebration.
Phrases and idioms:
Decoration Day US Memorial Day.
Etymology: F d{eacute}coration or LL decoratio (as DECORATE)