noun.
In biology, the origin of a new variety, race, or species from individuals which are restricted from free interbreeding with their kind.
noun.
Intensity, quantity, or degree of a quality, action, or effect.
noun.
The act of making intense; intensification.
noun.
In logic, a term used by Sir William Hamilton for the sum of the characters given in the definition of a term: intended to replace the term comprehension.