Source : Webster's Revised Unabridged Dictionary (1913)

This \This\ ([th][i^]s), pron. & a.; pl. {These} ([th][=e]z).
   [OE. this, thes, AS. [eth][=e]s, masc., [eth]e['o]s, fem.,
   [eth]is, neut.; akin to OS. these, D. deze, G. dieser, OHG.
   diser, deser, Icel. [thorn]essi; originally from the definite
   article + a particle -se, -si; cf. Goth. sai behold. See
   {The}, {That}, and cf. {These}, {Those}.]
   1. As a demonstrative pronoun, this denotes something that is
      present or near in place or time, or something just
      mentioned, or that is just about to be mentioned.

            When they heard this, they were pricked in their
            heart.                                --Acts ii. 37.

            But know this, that if the good man of the house had
            known in what watch the thief would come, he would
            have watched.                         --Matt. xxiv.
                                                  43.

   2. As an adjective, this has the same demonstrative force as
      the pronoun, but is followed by a noun; as, this book;
      this way to town.

   Note: This may be used as opposed or correlative to that, and
         sometimes as opposed to other or to a second this. See
         the Note under {That}, 1.

               This way and that wavering sails they bend.
                                                  --Pope.

               A body of this or that denomination is produced.
                                                  --Boyle.

               Their judgment in this we may not, and in that we
               need not, follow.                  --Hooker.

               Consider the arguments which the author had to
               write this, or to design the other, before you
               arraign him.                       --Dryden.

               Thy crimes . . . soon by this or this will end.
                                                  --Addison.

   Note: This, like a, every, that, etc., may refer to a number,
         as of years, persons, etc., taken collectively or as a
         whole.

               This twenty years have I been with thee.. --Gen.
                                                  xxxi. 38.

               I have not wept this years; but now My mother
               comes afresh into my eyes.         --Dryden.