“Refers to cooperative connections with people from different walks of life, more valuable than ‘bonding social capital’.” (Edwards)
“Bridging social capital … refers to the building of connections between heterogeneous groups; these are likely to be more fragile, but more likely also to foster social inclusion.” (Schuller, Baron, & Field, 2000)

As defined by Edwards in the Sloan Work and Family Research Network Social Capital Encylcopedia Entry. Schuller, T., Baron, S., & Field, J. (2000). Social capital: a review and critic. In S. Baron, J. Field, & T. Schuller (Eds.). Social Capital. Oxford: Oxford University Press.