Legal glossary

Security interest

Security interest: An interest in personal property that secures payment or performance of an obligation, governed by UCC Article 9.

Security interest — an attorney meeting a client

What security interest means

In practice, you will see security interest in pleadings, motions, orders and court rules. The definition above explains the general meaning. Even so, the meaning can shift with context. Therefore, always read it alongside the rule or document where it appears.

Where security interest comes up

The term is used across many kinds of cases. For example, you may see it in pleadings, motions and court orders. To see it in context, browse the motions and procedures library or the Learn the Law topics.

How to research the term

To research security interest, begin with the rule, statute or contract where the word is used. Each one can give it a slightly different meaning. Then compare that text with how courts in your area have applied it. Also check the local rules of your court, since they can add requirements. If your case is in state court, the state rules control. So start with our state procedures guide to find them. In the end, always confirm that the source you rely on is current.

You can read the current federal court rules online for free.

Related legal terms

  • Securitization: pooling loans or receivables and selling interests in the pool to investors, who are paid from the pooled assets.
  • Security (investment): under federal securities law, a broad category of investments including notes, stocks, bonds, evidences of indebtedness and investment contracts.
  • Service of process: formally delivering the summons and complaint to a defendant in a way the rules allow.
  • Servicer: the company that collects payments and handles the day-to-day administration of a loan on behalf of its owner.

Why precise terms matter

Courts read legal terms closely. As a result, knowing the exact meaning of a word helps you follow orders, rules and filings. Each glossary entry on Lawtopolis is short on purpose and links to the pages where the term is used.

Sources

Sources last reviewed: 2026-10-23

Lawtopolis provides legal information and education, not legal advice. Using this site does not create an attorney-client relationship. Laws and court rules vary by jurisdiction and change over time; verify every authority against the official source and consult a licensed attorney in your jurisdiction about your situation.