An insignia (from Latin insignia, plural of insigne 'emblem, symbol, ensign') is a sign or mark distinguishing a group, grade, rank, or function. It can be a symbol of personal power or that of an official group or governing body.
An insignia, which is typically made of metal or fabric, is a standalone symbol of a particular or general authority. Together, insignias form a decoration with the different elements of a rank, grade, or dignity.
There are many types of insignia, including civil and military decorations, crowns, emblems, and coats of arms.