Definition
A diadem is an ornamental headband or crown, often adorned with jewels. It is a symbol of royalty or high status, but typically less formal than a full crown. Think of it as the 'lite' version of a crown. Unlike a tiara, which is usually more elaborate, a diadem tends to be simpler and more band-like. It signifies authority and elegance in a subtle way. Diadems can also be used decoratively without any regal connotations, such as in bridal wear.