- 1a group of buildings of a similar type together in one place a sports complex an industrial complex (= a site with many factories) Thesaurusbuildingproperty premises complex structureThese are all words for a structure such as a house, school, or factory that has a roof and four walls.building a structure such as a house, school, or factory that has a roof and four wallsproperty a building or buildings and the surrounding land; land and buildings:We have a buyer who would like to view the property. Property values have risen enormously. This word is often used when talking about buying/selling houses or other buildings and land.premises [pl.] (formal) the building or buildings and surrounding land that a business or person owns or uses:The police searched the premises.complex a group of buildings of a similar type together in one place:an apartment complexstructure a thing that is made of several parts, especially a building:The pier is a wooden structure.Patterns (a/an) commercial/industrial/residential building/property/premises/complex an apartment building/complex a/the school building/premises to build a property/complex/structure to put up a building/property/structure to demolish/knock down a building/property/complex/structure
- 2a group of things that are connected This is just one of a whole complex of issues.
- 3(especially in compounds) a mental state that is not normal to suffer from a guilt complex see also inferiority complex, Oedipus complex, persecution complex
- 4if someone has a complex about something, they are worried about it in way that is not normal Don't mention her weight—she has a complex about it.
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