the.com/national debt

means The total amount of money a government owes to lenders, built up over years of spending more than it collects in taxes.

from Straightforward compound of 'national' (of the nation) and 'debt' — from Latin debitum, 'thing owed,' via Old French dette. The concept of sovereign borrowing took formal shape in Europe around the 17th-18th centuries, when governments began issuing long-term bonds to fund wars and institutions, most famously with the founding of the Bank of England in 1694 partly to manage crown debt. The phrase itself is simply descriptive — no hidden twist — but the thing it names has a long, tangled history of being considered either a dangerous burden or, as one 18th-century economist's school of thought argued, a sign of national credit and strength.