To a fresh law student hearing the word ‘common law’ would read ambiguous meaning. It is only those that have been a little knowledgeable in the legal field that would understand the meaning of the phrase ‘common law’. The pertinent question then is how do we arrive at the legal meaning of common law. This question and many others are what would be put to rest in this paper. This paper would make us understand what a legal system is, five types of legal system would be listed and two will be expatiated upon.