References are sources of information you point to when you need to back up what you're saying or show where you learned something. When you write a research paper about dolphins, your references are the books, websites, and articles you used to gather your facts. Without references, readers can't check if your information is accurate or learn more about the topic themselves.

Think of references like showing your work in math. You don't just write “42” as your answer; you show the steps that got you there. References show the steps you took to reach your conclusions. If you write that blue whales can weigh 200 tons, a reference tells readers exactly which marine biology book or scientific study gave you that fact.

The word also means people who can vouch for your character or abilities. When applying for a job or special program, you might list teachers or coaches as references: people who know you well enough to tell others about your strengths, reliability, and accomplishments. A strong reference from someone respected can make a real difference.

In everyday conversation, making a reference means mentioning something briefly, like when you reference a movie scene your friend will recognize.