complex
When used as an adjective, "complex" describes things that are complicated. It is often confused with "complicated," but "complex" usually implies a system with many interconnected parts. As a noun referring to buildings, it is a countable noun (e.g., one complex, two complexes). In psychology, the term "complex" refers to a hidden emotional pattern and is almost always preceded by an adjective describing the type of feeling, such as an "inferiority complex" or a "superiority complex."
💬Casual Conversation
🎬Tuesday afternoon, Chloe is sitting in a crowded university library.
Eleanor Smith
CHLOE I AM LOST. WHICH BUILDING IS THE MEDICAL COMPLEX?
Chloe Smith
Omg grandma, just hang tight and I'll swing by to get you.
💡
Eleanor is using 'complex' as a noun referring to a group of medical buildings. Chloe uses the phrasal verbs 'hang tight' (wait patiently) and 'swing by' (visit briefly), reflecting her casual student persona compared to Eleanor's all-caps, tech-struggling style.