Jimmy Wales, a member of the board who helped create Wikipedia, announced the donation in a tweet on Tuesday. He said a formal announcement would come Wednesday.
Google and Wikimedia did indeed make a formal announcement of the grant, saying the funds will support technical infrastructure to support growing traffic and to help make Wikipedia "easier to use and more accessible."
Wikimedia is funded primarily by individual donations; in the organization's fund-raiser for 2009 and 2010, 240,000 people donated more than $8 million during three quarters of Wikimedia's budget.
For more on this story, read Google donates $2 million to Wikimedi from CNET News.