Collateral could mean:

• Collateral (finance) in finance means a security or guarantee (usually an asset) pledged for the repayment of a loan if one cannot procure enough funds to repay. Also can be an exchange for voting rights.
• Collateral (film) is also the name of a 2004 action/thriller film.

See also

• Collateral damage
• Collateral contract
• Collateral ganglia
• Collateral estoppel
• Collateral Source Doctrine
• Collateralized debt obligation