This

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.
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.

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