The information content of a language is what language tells us bout the real word. There is a relationship between the symbols that we use to refer to things and the actual things or states that we describe with these representations. For example, we know that the string of letters "a-p-p-l-e" refers to a juicy red fruit and "m-e-l-t-i-n-g" refers to the state of turning from solid to liquid. 

Meaning is a cognitive and psychological phenomenon. Sense is the mental representation that we have of what a word or phrase means. It tells us how the meanings of words in our mind relate to each other.