A lavalier has multiple meanings depending on the context. Here are the different meanings of lavalier:

• Jewelry: A lavalier or lavaliere or lavalliere is an item of jewelry consisting of a pendant, sometimes with one stone, pendulous and centered from a necklace. The style was popularized by the Duchesse de la Vallière, a mistress of King Louis XIV of France. A lavalier can be recognized most for its drop, usually consisting of a stone and/or a chandelier pendant, which is attached directly to the chain, not by a bail.

• Fraternity and Sorority: In the American collegiate fraternity system, a lavalier is a necklace featuring a pendant made up of the male partners fraternitys letters. The male partner presents his female love interest with the lavalier as a symbol of his affection and commitment.

• Microphone: A lavalier microphone is a very small microphone that is attached either directly to an actors body or their clothing. They come in both wired and wireless varieties, and are designed to be discrete and lightweight. A wired lav may restrict an actor’s movement, but a wireless lav mic requires only a small transmitter pack that is typically clipped onto an actor’s belt or in their pocket.

In summary, a lavalier can refer to a type of jewelry, a symbol of commitment in the fraternity and sorority system, or a type of microphone.