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What does "complex" mean?

Vocabulary Word: complex

1. Definition (n.) apartment building

Examples My apartment is nice, but the other people in the complex aren’t very nice.

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2. Definition (adj.) complicated; not simple; having many different parts; advanced

Examples This math problem is complex. I don’t know how to solve it.

Examples This math problem is complex. I don’t know how to solve it.

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3. Definition (n.) group of emotions, ideas, and feelings that often cause a person to act strangely

Examples I had bad skin as a teenager and it gave me a serious complex!

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