catholic (with a little 'c') - The term catholic means universal which means that it is pertinent to all humankind. It occurs in the Greek classics such as in the writings of Aristotle and Polybius, and was freely used by the earlier Christian writers in non-ecclesiastical writings.
At Wikepedia it describes catholic as (literally meaning: according to (kata-) the whole (holos) or more generally "universal") is a religious term with a number of meanings: * The term can refer to the notion that all Christians are part of one Church, regardless of denominational divisions. ...
In the original versions of the ecumenical creeds, the word "catholic" is used to describe the entire church or the Christian faith. In this context, to call oneself "catholic" is to confess the fullness of the Christian faith without alteration.
Catholic (with a Big 'C') - One who belongs to the Catholic Church and subscribes to the teachings, creeds, beliefs and doctrines of the Catholic Church. There are various rites to the Catholic church, but the one that most are familiar with and usually are referring to when they say Catholic is the Roman Catholic Church.
Catholic Church - The Catholic church contains many rites. The Roman Catholic Church was founded in the year 33 by Jesus Christ. The Pope is the earthly head of the church and is the bishop of Rome. The first pope was Pope St. Peter and was appointed by Jesus to lead his church on earth. Today there are 33,000 Plus churches that make a claim to being Christian, but he RCC was the first and the original.
Located in the Vatican, the Roman Catholic Church is the only church that is a religion and a nation. The Pope as well as being the head of the Catholic church is also a head of state. It is a Bible based church, but does not believe in Bible Only and neither did the early Christians. The Catholic church uses written and oral tradition and teachings just as St. Paul instructed the people to do.