Most service contracts open with a list of defined terms, often under a heading such as Definitions. Many buyers skip it and go straight to the coverage promise. That order works against the reader. Words such as breakdown, wear, failure, and original condition carry the meaning the contract gives them, and the promise is only as wide as the definitions that feed it.
What a defined term does
A defined term replaces its ordinary meaning with the contract's meaning wherever the capitalized word appears. If the contract says that Breakdown means a mechanical or electrical failure that stops the item from performing its basic function, then a noise, a slow drain, or a loss of cooling may or may not meet that test, depending on the words that follow. Read the definition, then read every promise that uses the word, and mark each place where the definition narrows or widens what the promise says.
The words to find first
Search the contract for these terms and copy down the definition of each one that appears: breakdown or failure, which sets the event the contract responds to; wear or normal wear, which often sets what is left out; original condition or pre-existing condition, which can decide whether an older problem is treated as new; covered item or covered component, which sets the list of parts; repair and replacement, which sets what the contract will do; authorized repairer or dealer, which sets who may do the work; and term and start date, which sets when the clock begins.
Trace one event through the definitions
Pick an event that matters to your household and follow it. Start with the promise sentence, then follow each capitalized word to its definition, then follow any exclusion that refers back to the same word. Do this for two or three events you actually worry about. A promise can read broadly while a definition inside it narrows the event to a smaller set than the sentence suggests.
Questions to ask the seller before you sign
Ask the seller to point to the definition of each key word and to explain, in plain words, how the contract decides whether an event counts. Ask whether you can have the full contract text before any payment is made. Ask whether any definition refers to a document outside the contract, and if it does, ask for that document too. Ask how an unclear definition is resolved and whether the contract names a method for that. Write down the seller's answers and the name of the person who gave them. A spoken explanation does not change the written definition, so if the answer differs from the paper, the paper controls what you can rely on.
Where the state rules come in
Some states set rules for service contracts, and those rules can affect how terms must be written or what a contract must disclose. The regulator and the statute that govern each state are named on that state's page on this site. Check the statute for your state before you rely on any reading of a definition. This guide does not restate any state's rules and does not summarize any particular contract.
What this guide does not do
This is a general explainer. It does not say whether a contract fits your household, which product to choose, or whether any claim will be paid. Those decisions rest with you, the written contract, and the governing statute.