Definition of 'Run Rate'
1. How the financial performance of a company would look if you were to extrapolate current results out over a certain period of time.
2. The average annual dilution from company stock option grants over the most recent three year period recorded in the annual report.
Investopedia explains 'Run Rate'
In the context of extrapolating future performance (the first definition), the run rate helps to put the company's latest results in perspective. For example, if a company has revenues of $100 million in its latest quarter, the CEO might say: "Our latest quarter puts us at a $400 million run rate." All this is saying is that if the company were to perform at the same level for the next year, they'd have annual revenues of $400 million.
The run rate can be a very deceiving metric, especially in seasonal industries. A great example of this is a retailer after Christmas. Almost all retailers experience higher sales during the holiday season. It is very unlikely that the coming quarters will have sales as strong as in the 4th quarter, and so the run rate will likely overstate next year's revenue.