2.VerbTo represent something abstract or intangible as material; to embody.
3.VerbTo attribute emotions etc to external circumstances; to project.
4.VerbTo direct to others, as costs or benefits.
"Offering high-quality software as open-source externalizes benefits to a large community, but also externalizes much of the cost of testing and further development.; Operating a low-cost, high-pollution manufacturing process externalizes costs in the form of adverse human health consequences and ecosystem effects."