Definition from Wiktionary, the free dictionary
millionth (not comparable)
- The ordinal form of the number one million.
- 1,000,000th, 1,000,000th (also written without commas, or, in technical usage with a thin space replacing each comma)
millionth (plural millionths)
- The person or thing in the millionth position.
- One of a million equal parts of a whole. Term ppm (parts per million) is also used.
person or thing in the millionth position
one of a million equal parts of a whole