/ˈhɛrəldri/
[noun] The system of symbols, colours, and designs used on shields and flags to represent families, cities, or countries. It also refers to the study of these symbols and their history.
The word 'heraldry' comes from a job title — a herald was a royal messenger whose most important duty was announcing warriors by their symbols on the battlefield.
To understand heraldry, you must first understand the herald — the human being at the centre of this whole tradition. The word comes from Old French heralt or hiraut, which itself came from a Frankish or Proto-Germanic compound: something close to *harjawaldaz, built from two roots meaning 'army' and 'rule' or 'power'. So the original herald was, quite literally, someone who commanded or managed an army. This is the same Germanic root that gives us the name Harold, meaning a leader of warriors. The journey continued from Old French into Middle English as heraud in the 14th century, and from there the abstract noun heraldry formed naturally — the art and office of the herald himself.
In the medieval world, heralds were much more than simple messengers. They were official figures attached to royal courts and noble households, responsible for carrying diplomatic messages between warring armies and announcing the names and lineages of knights before tournaments. Because knights in full armour were impossible to identify by face, heralds became expert readers of the symbols painted on shields and embroidered on surcoats — the coloured tunics worn over armour. These symbols, which we now call coats of arms, were the herald's primary professional language.
The system of visual identification that heralds managed had become urgently necessary by the 12th and 13th centuries, precisely because plate armour and closed helmets had made the human face invisible on the battlefield. Families, towns, and military orders began adopting distinctive combinations of colours and shapes — lions, eagles, crosses, chevrons, geometric bands — that could be recognised instantly at a distance. Heralds catalogued these designs, settled disputes about who owned which symbol, and gradually developed a precise technical vocabulary for describing every element of a coat of arms. That vocabulary is so specialised it almost feels like a foreign language: 'gules' for red, 'azure' for blue, 'or' for gold, 'argent' for silver.
Many of these descriptive terms came from Old French and Norman French — not accidentally, since the Norman conquest of England in 1066 had installed a French-speaking ruling class that became the primary users of heraldic symbols. Words like 'gules' trace back through Old French goules to Persian gul, meaning rose — the deep red colour of rose petals. 'Azure' travels from Old French azur → Medieval Latin lazurium → Arabic lāzaward → Persian lāzhward, the name of the region where brilliant blue lapis lazuli was mined. Even in its colour words, heraldry carries the fingerprints of medieval trade routes stretching from Europe to Central Asia.
Over time, heraldry expanded far beyond its military origins. By the late Middle Ages it had become a complex system of social identity, used by cities, universities, guilds, and the Church — not just noble families. Today, heraldry as a living institution is still maintained in many countries: the College of Arms in England, founded in 1484, continues to grant and record coats of arms officially. The word itself has also grown metaphorical. When we say something 'heralds' a new era, we use the very same root — the herald who rides ahead to announce what is coming. In this way, every weather forecast that 'heralds' a storm is, in miniature, a medieval messenger galloping across a battlefield.