Lasagna takes its name not from the pasta or the dish but from the pot it was cooked in. Greek lasanon meant a trivet or stand for a cooking vessel. Latin borrowed it as lasanum, shifting the meaning to the pot itself — and, in colloquial Latin, a chamber pot as well. Italian then transferred the word from the container to the flat sheets of pasta cooked inside it, a semantic slide that happens often in food vocabulary.
The earliest surviving lasagna recipe appears in the Liber de Coquina, a 14th-century manuscript from the Angevin court in Naples. It describes layers of fermented dough separated by cheese and spices. No tomato sauce — tomatoes were unknown in Europe before the Columbian Exchange, and Italians did not widely adopt them in cooking until the 18th century. The medieval dish would have
Regional variations developed across Italy over the centuries. Bologna claims lasagne alla bolognese, layered with ragu and bechamel. Naples has its own version with small meatballs, ricotta, and hard-boiled eggs, traditionally served at Carnival. The plural form lasagne is standard in Italian and British English, while American English typically uses the singular lasagna for both the pasta and the assembled dish.
The word entered English in the mid-19th century but remained unfamiliar to most English speakers until Italian immigration to America and Britain made the dish widely available in the 20th century. By the 1970s, frozen lasagna had become one of the bestselling convenience foods in the United States and United Kingdom.
An alternative etymology linking the word to Arabic lawzinaj, an almond-and-sugar pastry, was proposed in the 20th century but has not gained strong scholarly support. The Greek-Latin path remains the standard account.