Trade Deficit.
In plain English
A trade deficit means a country's imports exceed its exports over a period, so on net it is buying more from abroad than it sells. It is often treated as a scoreboard, but a deficit is not automatically bad: it can reflect strong consumer demand and a country's ability to attract foreign investment. The US has run a trade deficit for decades while its economy grew. What matters is the fuller picture of why the gap exists, not the number alone.
01Why it matters
The trade deficit is a favorite political talking point, so understanding that it is not simply good or bad helps you read the headlines with a clearer eye.
02The math, step by step
In a month the US exports 250 billion dollars of goods and services but imports 300 billion. The 50 billion dollar gap is that month's trade deficit.
03What this is NOT
A trade deficit is NOT the national debt. The trade deficit is the gap between what a country imports and exports; the national debt is what the government owes from borrowing.