millionth

Everyday

1. Millionth means coming at number 1,000,000 in order. tree →
2. A millionth is one part when something is divided into a million equal parts (1/1,000,000). tree →

In the lessons

In maths, millionth is an ordinal number (first, second… millionth) and also a fraction: one millionth = 0.000001. Shops and websites celebrate their millionth customer. In everyday talk, "for the millionth time" means "I've said it very many times".

Examples

• She was the shop's millionth customer. tree →
• A micrometre is a millionth of a metre. tree →
• One millionth is written 0.000001. tree →
• For the millionth time, tidy your room! tree →
• A grain of dust may weigh a millionth of a gram. tree →
• The website celebrated its millionth visitor. tree →

Note

Spelled with -th at the end. In maths: 1 ÷ 1,000,000 = one millionth; three millionths = 3/1,000,000. Trap: "a millionth" is tiny, while "a million" is huge.