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Science · Grades 5–6

Compound

noun

A substance formed when two or more elements are chemically bonded together.

Example Sentences

"Water (H₂O) is a compound made of hydrogen and oxygen."

"Table salt is a compound made from sodium and chlorine."

Synonyms & Related Terms

chemical combination

Quick Check

Which best describes the meaning of compound?

Study Tips

To remember compound, try writing it in a sentence of your own. Connect it to something you already know about science.

Use it in conversation today — saying a word aloud three times helps lock it into long-term memory.