Pronunciation: (ku-lat'ur-ul),[key] —n. 1. security pledged for the payment of a loan: He gave the bank some stocks and bonds as collateral for the money he borrowed. 2. Anat. a. a subordinate or accessory part.
b. a side branch, as of a blood vessel or nerve.
c. See collateral circulation. 3. a relative descended from the same stock, but in a different line.
—adj. 1. accompanying; auxiliary: He received a scholarship and collateral aid. 2. additional; confirming: collateral evidence; collateral security. 3. secured by collateral: a collateral loan. 4. aside from the main subject, course, etc.; secondary: These accomplishments are merely collateral to his primary goal. 5. descended from the same stock, but in a different line; not lineal: A cousin is a collateral relative. 6. pertaining to those so descended.
7. situated at the side: a collateral wing of a house. 8. situated or running side by side; parallel: collateral ridges of mountains. 9. Bot.standing side by side.