intension

UK: /ɪnˈtɛnʃən/ US: (in ten′shən)

WordReference Random House Unabridged Dictionary of American English © 2026

in•ten•sion  (in ten′shən), n. 

1. intensification;
   increase in degree.
2. intensity;
   high degree.
3. relative intensity;
   degree.
4. exertion of the mind;
   determination.
5. Philosophy [Logic.] (of a term) the set of attributes belonging to all and only those things to which the given term is correctly applied;
   connotation;
   comprehension. Cf. extension (def. 12).

• Latin intēnsiōn- (stem of intēnsiō). See intense, -ion
• 1595–1605

in•ten′sion•al, adj. 
in•ten′sion•al•ly, adv. 

Collins Concise English Dictionary © HarperCollins Publishers::

intension / ɪnˈtɛnʃən/ noun

1. the set of characteristics or properties by which the referent or referents of a given word are determined: thus, the intension of marsupial is the set containing the characteristics suckling its young and having a pouch
   Compare extension11a
2. a rare word for intensity, determination
3. a rare word for intensification
   See intensification