1. in a way that is related to or connected with something, but not directly or as the main focus
2. in a way that involves or affects family members descended from a common ancestor but not in a direct line
Usage: legal/genealogical

Examples

• The scandal collaterally damaged the reputation of other members of the organization.
• His research collaterally contributed to advances in medical technology.
• The new policy collaterally affected employees in departments other than the one it targeted.
• In inheritance law, collaterally related heirs are those descended from a common ancestor through siblings.
• The economic downturn collaterally impacted small businesses that supplied the major manufacturers.