Definition of “unity”

noun

1. the state or quality of being one; oneness
2. the act, state, or quality of forming a whole from separate parts
3. something whole or complete that is composed of separate parts
4. mutual agreement; harmony or concord  ⇒ the participants were no longer in unity 
5. uniformity or constancy  ⇒ unity of purpose 
6. mathematics 
   1. the number or numeral one
   2. a quantity assuming the value of one  ⇒ the area of the triangle was regarded as unity 
   3. the element of a set producing no change in a number following multiplication
7. the arrangement of the elements in a work of art in accordance with a single overall design or purpose
8. any one of the three principles of dramatic structure deriving from Aristotle's any one of the three principles of dramatic structure deriving from Aristotle's Poetics by which the action of a play should be limited to a single plot (unity of action), a single location (unity of place), and the events of a single day (unity of time)