insignia

Short definition from Wiktionary

Noun

1. 1
   A patch or other object that indicates a person's official or military rank, or membership in a group or organization.
2. 2
   A symbol or token of personal power, status, or office, or of an official body of government or jurisdiction.
3. 3
   A mark or token by which anything is known.
4. 4
   plural of insignium
5. 5
   plural of insigne