Insignia \In*sig"ni*a\, n. pl. [L. insigne, pl. insignia, fr. insignis distinguished by a mark; pref. in- in + signum a mark, sign. See Ensign, Sign.]

1. Distinguishing marks of authority, office, or honor; badges; tokens; decorations; as, the insignia of royalty or of an order.

2. Typical and characteristic marks or signs, by which anything is known or distinguished; as, the insignia of a trade.

Source: Webster's Revised Unabridged Dictionary (1913)