This and these are used in different ways when you are referring to people, things, situations, events, or periods of time. See examples of these used in a sentence. This, that, these and those are demonstratives.
We use this, that, these and those to point to people and things. These and those are plural. This and these are demonstratives, which means they indicate a specific noun in a sentence.
2 days agothe meaning of these is plural of this. Definition of these in oxford advanced american dictionary. You use these when you refer to something which you expect the person you are talking to to know about, or when you are checking that you are both thinking of the same person or thing.