/thing'in it self"/ , n. , pl. things-in-themselves /thingz'in dheuhm selvz"/ . Kantianism.
reality as it is apart from experience; what remains to be postulated after space, time, and all the categories of the understanding are assigned to consciousness. Cf. noumenon (def. 3).
[ 1650-60; trans. of G Ding an sich ]