Quick definitions from WordNet (collateral)
▸ noun: a security pledged for the repayment of a loan
▸ adjective: descended from a common ancestor but through different lines ("Cousins are collateral relatives")
▸ adjective: situated or running side by side ("Collateral ridges of mountains")
▸ adjective: accompaniment to something else ("Collateral target damage from a bombing run")
▸ adjective: serving to support or corroborate ("Collateral evidence")
▸ Also see collateral
▸ noun: a security pledged for the repayment of a loan
▸ adjective: descended from a common ancestor but through different lines ("Cousins are collateral relatives")
▸ adjective: situated or running side by side ("Collateral ridges of mountains")
▸ adjective: accompaniment to something else ("Collateral target damage from a bombing run")
▸ adjective: serving to support or corroborate ("Collateral evidence")
▸ Also see collateral