Look at that.
Meaning: This is a way of asking someone to focus their attention on something that you think is interesting or important.
Choice of Words: Look means to direct your eyes in a specific direction or to focus your attention on something. At is used to indicate the direction or object of your attention. That is a pronoun that refers to something specific but not yet identified. When you put them together, "Look at that" is a simple instruction asking someone to focus their attention on something specific.
Alternative Expressions
Related Expressions