A straining, stretching, or bending; the state of being strained; as, the intension of a musical string. [1913 Webster]
Increase of power or energy of any quality or thing; intenseness; fervency. Jer. Taylor. [1913 Webster]
The collective attributes, qualities, or marks that make up a complex general notion; the comprehension, content, or connotation; -- opposed to extension, extent, or sphere. [1913 Webster]
, n.
1 Logic the internal content of a concept.
2 formal the intensity, or high degree, of a quality.
3 formal the strenuous exertion of the mind or will.