[f. THIS + -NESS: rendering med. (Scholastic) L. hæcceitās.] The quality of being this (as distinct from anything else): = HÆCCEITY.
1643. [see THATNESS].
1837. Whewell, Hist. Induct. Sc. (1857), I. 244. Which his school called Hæcceity or thisness.
1895. Rashdall, Universities, II. 532. An individuating form called by the later Scotists its hæcccitas or thisness.