complexity noun - Definition, pictures, pronunciation and usage notes . . . Definition of complexity noun from the Oxford Advanced Learner's Dictionary [uncountable] the state of being formed of many parts; the state of being difficult to understand I was astonished by the size and complexity of the problem Only now did he understand the full complexity of the problem
complexities - WordReference. com Dictionary of English com•plex•i•ty (kəm plek′ si tē), n , pl -ties for 2 the state or quality of being complex; intricacy: the complexity of urban life something complex: the complexities of foreign policy