complex
word
Definition
Something complex has many connected parts, details, or ideas, so it is not simple or easy to understand. As a noun, it can also mean a group of buildings or related things in one place.
Usage & Nuances
Most commonly, 'complex' is an adjective meaning 'complicated' or 'not simple': 'a complex problem', 'a complex system'. It is common in school, work, science, and formal contexts. As a noun, it often appears in combinations like 'apartment complex' or 'sports complex'. Do not confuse this use with the psychological noun 'a complex' meaning a strong mental or emotional issue.
Example Sentences
This math question is too complex for me.
basic
The machine has a complex system inside.
basic
They live in a large apartment complex.
basic
It sounds simple at first, but it's actually pretty complex.
natural
She's great at explaining complex ideas in a clear way.
natural
The whole situation is more complex than people think.
natural