Main Page | See live article | Alphabetical index One million is a thousand thousand, or 106. It can also be expressed as the prefix Mega, when dealing with metric (SI) units. The million is sometimes used in the English language as a metaphor for a very large number, as in "Never in a million years" and "You're one in a million". This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.