[n] a security pledged for the repayment of a loan
[adj] descended from a common ancestor but through different lines; "cousins are collateral relatives"; "an indirect descendant of the Stuarts"
[adj] situated or running side by side; "collateral ridges of mountains"
[adj] accompaniment to something else; "collateral target damage from a bombing run"
[adj] serving to support or corroborate; "collateral evidence"