D defs.my
Entry 3 senses Webster, 1913

Intension

· In·ten·sion · IPA /ɪnˈtɛnʃən/
01 n. A straining, stretching, or bending; the state of being strained; as, the intension of a musical string.
  1. 1.
    A straining, stretching, or bending; the state of being strained; as, the intension of a musical string.
  2. 2.
    Increase of power or energy of any quality or thing; intenseness; fervency.
    “Sounds . . . likewise do rise and fall with the intension or remission of the wind.” Bacon.
  3. 3.
    The collective attributes, qualities, or marks that make up a complex general notion; the comprehension, content, or connotation; -- opposed to extension, extent, or sphere.(Logic & Metaph.)
    “This law is, that the intension of our knowledge is in the inverse ratio of its extension.” Sir W. Hamilton.