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 …

COMPLEXITY definition: the state or quality of being complex; intricacy. See examples of complexity used in a sentence.

Mar 9, 2026 · Complexity refers to a scientific theory that asserts that some systems display behavioral phenomena that are inexplicable by conventional explanations or analysis of its individual parts.

COMPLEXITY meaning: 1. the state of having many parts and being difficult to understand or find an answer to: 2. the…. Learn more.

Complexity is the state of having many different parts connected or related to each other in a complicated way. ...a diplomatic tangle of great complexity.

Definitions of complexity often depend on the concept of a "system" – a set of parts or elements that have relationships among them differentiated from relationships with other elements outside the …

Mar 11, 2026 · Complexity describes a state where many interconnected parts interact in ways that make the whole system difficult to predict or reduce to simple rules. The word comes from the Latin …

com•plex•i•ty (kəmˈplɛk sɪ ti) n., pl. -ties. 1. the state or quality of being complex; intricacy: the complexity of urban life. 2. something complex: the complexities of foreign policy.

complexity, n. meanings, etymology, pronunciation and more in the Oxford English Dictionary

Oct 21, 2011 · Despite the importance and ubiquity of the concept of complexity in modern science and society, no general and widely accepted means of measuring the complexity of a physical object, …