Definition of "suchness"

The importance of which may be fully and plainly rendered thus; that since nothing in the Universe stands possessed of a Real or True Nature, i.e. doth constantly and invariately hold the precise Quale, or Suchness of their particular Entity, to Eternity; […]

1654, Walter Charleton, Physiologia Epicuro-Gassendo-Charltoniana

The same relation may prevail between the suchness of willing in men and the realization of that willing.

ca. 1928, Hans Driesch, "Philosophy of Nature", in, 1928, Edward Leroy Schaub, ed., Philosophy Today: Essays on Recent Developments in the Field of Philosophy, page 431

Without any apparent regard for the suchness of her environment, she sat down.

1955, J. D. Salinger, "Franny", in, 1961, Franny and Zooey, 1991 LB Books edition, page 22

Rather than give an answer, you have to section the tangerine and invite the questioner to have a taste. Doing this, you allow him or her to enter the suchness of the tangerine without any verbal or conceptual description.

1988, Thich Nhat Hanh, The Sun My Heart: From Mindfulness to Insight Contemplation, Parallax Press, page 94