Logic. proving directly.
Grammar. specifying identity or spatial or temporal location from the perspective of one or more of the participants in an act of speech or writing, in the context of either an external situation or the surrounding discourse, as we, you, here, there, now, then, this, that, the former, or the latter.
Grammar. a deictic element.
Origin of deictic
1820–30; < Greek deiktikós demonstrative, equivalent to deikt(ós) able to be proved, verbal adjective of deiknýnai to show, prove, point + -ikos -ic
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Word Origin for deictic
C17: from Greek deiktikos concerning proof, from deiknunai to show
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
1828, from Latinized form of Greek deiktikos "able to show," from deiktos "shown," verbal adjective from deiknynai "to show" (see diction).
Online Etymology Dictionary, © 2010 Douglas Harper