What is a boutonniere?

A boutonniere is specifically a small floral arrangement that is worn on the lapel of a suit or coat, typically secured with a pin or attached directly to the fabric. It serves as a decorative accessory, often worn by men during formal occasions such as weddings, proms, or other ceremonial events. This distinguishable feature adds a touch of elegance and flair to the outfit.

The other options describe different types of floral arrangements or uses. A large floral centerpiece for dining tables is more suited for enhancing table decor and is generally larger than a boutonniere. A decorative arrangement for outdoor events could encompass a variety of styles and sizes, but it does not specifically refer to the personal adornment characteristic of a boutonniere. Lastly, a floral design used exclusively in weddings falls short of capturing the broad application of boutonnieres, as they can also be used for other formal occasions beyond weddings. Thus, the definition of a boutonniere as a lapel accessory is both accurate and distinct from the other choices.