Definition

Noun: 1. The interrelation of reciprocity whereby one thing supplements or depends on the other. This describes a relationship where two distinct things are mutually dependent, each completing or enhancing the other by supplying what the other lacks. 2. A relation between two opposite states or principles that together exhaust the possibilities. This describes a conceptual pairing where two contrasting elements form a complete, coherent whole, often used in physics, philosophy, and social sciences.

Usage and Examples

• Noun:
  • The complementarity of theory and practice is essential for a good education. (The mutual enhancement between theory and practice is crucial.)
  • In quantum mechanics, the principle of complementarity states that particles have both wave-like and particle-like properties. (The two seemingly opposite descriptions together form a complete picture.)
  • The economic complementarity between the two countries led to a strong trade partnership. (Each country's economy supplied what the other's lacked, creating a beneficial relationship.)

Advanced Usage

• Principle of Complementarity: A foundational concept in quantum physics introduced by Niels Bohr, stating that objects have complementary properties (like position and momentum) that cannot be observed simultaneously but are both necessary for a full description.
  • Bohr's principle of complementarity revolutionized our understanding of the subatomic world.
• Conceptual Complementarity: Used in fields like biology, sociology, or linguistics to describe how two opposing frameworks or explanations are both valid and necessary to understand a complex phenomenon.
  • The debate often reflects a conplementarity of perspectives rather than a simple right-or-wrong conflict.

Variants and Related Words

• Complement (noun/verb): Something that completes or goes well with something else; to add to something in a way that improves it.
  • Wine is a perfect complement to cheese.
• Complementary (adjective): Combining in such a way as to enhance or emphasize each other's qualities.
  • They have complementary skills; she is creative, and he is analytical.
• Complementariness (noun): The state or quality of being complementary. (Less common synonym for complementarity).

Synonyms

• Mutuality: The sharing of a feeling, action, or relationship between two or more parties.
• Interdependence: The dependence of two or more people or things on each other.
• Reciprocity: The practice of exchanging things with others for mutual benefit.

Related Phrases and Idioms

• "Two sides of the same coin": An idiom describing two different but inherently linked or complementary aspects of a single concept or situation. This captures the essence of complementarity.
  • Risk and reward are often two sides of the same coin in investing.

Noun

1. the interrelation of reciprocity whereby one thing supplements or depends on the other
   • the complementarity of the sexes
2. a relation between two opposite states or principles that together exhaust the possibilities