Pronunciation: (in-ten'shun),[key] —n. 1. intensification; increase in degree.
2. intensity; high degree.
3. relative intensity; degree.
4. exertion of the mind; determination.
5. 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).