What does mortgage-backed security mean?
• MORTGAGE-BACKED SECURITY (noun) The noun MORTGAGE-BACKED SECURITY has 1 sense: 1. a security created when a group of mortgages are gathered together and bonds are sold to other institutions or the public; investors receive a portion of the interest payments on the mortgages as well as the principal payments; usually guaranteed by the government Familiarity information: MORTGAGE-BACKED SECURITY used as a noun is very rare.