Perhaps you've run across terms, such as:
Governing Law
Counterparts
Material Breach
Representations
Indemnifications
Material Default
Fiduciary
Letter of Intent
Penalty Clause
Arbitration
Copyright
You can find the definitions and explanations for all these and thousands of other legal terms in the pocket-sized Barron's Law Dictionary by Steven H. Gifis. You can find the book on Amazon for less than $5.00.
Whether you buy this book or find another more suitable resource to meet your needs, it's good to have on hand a legal terms dictionary, or access to legal terms information online. You'll need that information to help you navigate your next legal document.
Don't sign or approve a document with legal language you don't understand.