Let’s start by having a look at the following two comments by Gartner analyst Nathan Wilson, in an interview with ZDNet.

NW: “DevOps does not have a consistent definition within the industry and the definition is changing because of different impacts. But initially we defined DevOps as applying agile techniques to operations and getting development and operations to actually work together.”

via What’s the relationship between DevOps and Continuous Delivery? | ITProPortal.com.