a. [ Gr. deiktiko`s serving to show or point out, fr. deikny`nai to show. ] 1. (Logic) Direct; proving directly; -- applied to reasoning, and opposed to elenchtic or refutative. [ 1913 Webster ]
2. (Grammar) showing or pointing to directly; pertaining to deixis; -- used to designate words that specify identity, location, or time from the perspective of one of the participants in a discourse, using the surrounding context as reference; as, the words this, that, these, those, here, there, now, then, we, you, they, the former, and the latter serve a deictic function. [ PJC ]