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. accompany, concomitant; "collateral target damage from a bombing run"

adj. serving to support or corroborate; "collateral evidence"