[{"Bold_text": "adjective", "List Items": ["composed of many interconnected parts; compound; composite:a complex highway system.", "characterized by a very complicated or involved arrangement of parts, units, etc.:complex machinery.Antonyms: simple", "so complicated or intricate as to be hard to understand or deal with:a complex problem.Synonyms: labyrinthine , tangled , knotty Antonyms: simple", "Grammar.(of a word) consisting of two parts, at least one of which is a bound form, aschildish,which consists of the wordchildand the bound form-ish. complex sentence complex sentence.", "(of a word) consisting of two parts, at least one of which is a bound form, aschildish,which consists of the wordchildand the bound form-ish.", "complex sentence complex sentence.", "Mathematics.pertaining to or using complex numbers:complex methods; complex vector space."]}, {"Bold_text": "noun", "List Items": ["an intricate or complicated association or assemblage of related things, parts, units, etc.:the entire complex of our educational system; an apartment complex.Synonyms: labyrinth , tangle , web , network", "Psychology.a system of interrelated, emotion-charged ideas, feelings, memories, and impulses that is usually repressed and that gives rise to abnormal or pathological behavior.", "a fixed idea; an obsessive notion.", "Mathematics.an arbitrary set of elements of a group.a collection of simplexes having specified properties.", "an arbitrary set of elements of a group.", "a collection of simplexes having specified properties.", "Also called coordination compound coordination compound.Chemistry.a compound in which independently existing molecules or ions of a nonmetalcomplexing agentform coordinate bonds with a metal atom or ion.Compare ligand(def2) ligand(def2).", "Biochemistry.an entity composed of molecules in which the constituents maintain much of their chemical identity:receptor-hormone complex, enzyme-substrate complex."]}, {"Bold_text": "verb (used with object)", "List Items": ["Chemistry.to form a complex with."]}, {"Bold_text": "verb (used without object)", "List Items": ["Chemistry.to form a complex."]}]