badge

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A device or emblem worn as an insignia of rank, office, or membership in an organization.
• noun An emblem given as an award or honor.
• noun A characteristic mark or indicative trait.

from The Century Dictionary.

• noun A breed of domesticated pigeons, so named because of the sprinkling of white about the head and 10 white flight-feathers.
• To hawk for sale; buy up, as provisions, for the purpose of selling again; regrate.
• noun A token or cognizance worn in allusion to the wearer's occupation, position, preferences, or achievements.
• noun A mark, token, or device worn by servants, retainers, partizans, or followers, as a sign of their allegiance, or a similar token worn by members of an association to indicate their membership.
• noun The mark or token of anything.
• noun Nautical: A carved ornament formerly placed on ships, near the stern, and often containing the representation of a window. A mark of good conduct awarded in the United States naval service to seamen distinguished for sobriety and obedience.
• To mark or distinguish with a badge or as with a badge.

from the GNU version of the Collaborative International Dictionary of English.

• transitive verb To mark or distinguish with a badge.
• noun A distinctive mark, token, sign, or cognizance, worn on the person.
• noun Something characteristic; a mark; a token.
• noun (Naut.) A carved ornament on the stern of a vessel, containing a window or the representation of one.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun A distinctive mark, token, sign, emblem or cognizance, worn on one's clothing, as an insignia of some rank, or of the membership of an organization.
• noun A small nameplate, identifying the wearer, and often giving additional information.
• noun A card, sometimes with a barcode or magnetic strip, granting access to a certain area.
• noun Something characteristic; a mark; a token.
• noun obsolete, slang, obsolete, cant A brand on the hand of a thief, etc.
• noun nautical A carved ornament on the stern of a vessel, containing a window or the representation of one.
• noun heraldry A distinctive mark worn by servants, retainers, and followers of royalty or nobility, who, being beneath the rank of gentlemen, have no right to armorial bearings.
• verb transitive To mark or distinguish with a badge.
• verb transitive To show a badge to.
• verb transitive To enter a restricted area by showing one's badge.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun an emblem (a small piece of plastic or cloth or metal) that signifies your status (rank or membership or affiliation etc.)
• noun any feature that is regarded as a sign of status (a particular power or quality or rank)
• verb put a badge on