insignia

An insignia is a badge you wear to show your position or affiliation. If you're an Eagle Scout, you can wear that insignia, or, if you're a Red Sox fan, you might wear the team logo as your insignia.

The word insignia includes the word "sign" — an insignia is a sign that shows your connection to some organization. Military officers wear insignias that indicate their rank. When you watch the president of the United States give a speech, you'll see on the lectern the official presidential insignia — the circular seal with the eagle inside.

Definitions of insignia
1

n a badge worn to show official position

Types:
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caduceus
an insignia used by the medical profession; modeled after the staff of Hermes
insignia of rank
an insignia worn on a military uniform
shoulder flash
something worn on the shoulder of a military uniform as an emblem of a division etc.
hash mark, hashmark, service stripe
an insignia worn to indicate years of service
cordon
cord or ribbon worn as an insignia of honor or rank
wings
stylized bird wings worn as an insignia by qualified pilots or air crew members
Type of:
badge
an emblem (a small piece of plastic or cloth or metal) that signifies your status (rank or membership or affiliation etc.)

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