There are multiple definitions - click on the translation that matches your context.

Sicherheit

Substantiv

full

collateral

noun

Comparative law notes

Germany

Use this term only if it is clear that the form of security is a property interest.

Definitions of collateral

English

assets (=something valuable) that you promise to give someone if you cannot pay back money that you owe them

We used our house as collateral for the loan.