Dictionary

A security or guarantee (usually an asset) pledged for the repayment of a loan if one cannot procure enough funds to repay.

(genealogy) A collateral (not linear) family member.

A branch of a bodily part or system of organs.

Example: Besides the arteries blood streams through numerous veins we call collaterals.

Printed materials or content of electronic media used to enhance sales of products (short form of collateral material).

Parallel, along the same vein, side by side.

Corresponding; accompanying, concomitant.

Being aside from the main subject, target, or goal.

Example: Although not a direct cause, the border skirmish was certainly a collateral incitement for the war.

(genealogy) Of an indirect ancestral relationship, as opposed to lineal descendency.

Example: Uncles, aunts, cousins, nephews and nieces are collateral relatives.