|Origin:||collateralis, from Latin com- ( COM-) + lateralis ( LATERAL)|
collateral2 [only before noun]
people who are hurt or killed, or property that is damaged accidentally in a war - used especially by the army, navy etc:
Hitting any non-military targets would risk 'collateral damage'.
relating to something or happening as a result of it, but not as important:
There may be collateral benefits to the scheme.
collateral relatives are members of your family who are not closely related to you