BLI may refer to: Biology Bio-layer interferometry, a real-time technique to study biomolecular interactions Bioluminescence imaging, a technology that allows for the noninvasive study of small laboratory animals Organizations Bible Lessons International, an American Bible study ministry BirdLife International, the international conservation organization working to protect the world's birds and their habitats Other Bellingham International Airport, a public airport located three miles (5 km) northwest of Bellingham, Whatcom County, Washington OECD Better Life Index, an interactive tool that allows people to compare countries' performances according to their own preferences BackLog Item, an item in the backlog in Scrum (software development)