The meaning of life is for us to discover that we are true children of an infinitely loving and merciful God, to find out what our responsibilities are to our Creator, and to fulfill those responsibilities.
Life can be used to define the existence of a living thing. Life is also used in describing the normal routine of time passed by human beings or animals. Basically life is a term used in reference to the evolution of living creatures.
The meaning of life is to know, love, and serve God (Jn 17:3; Sir 1:11-12; Catechism 356, 357, 1721). This is where we will find our fulfillment here on earth and in heaven. Love is the underlying theme throughout the Bible (1 Jn 4:8; Jn 3:16). In fact, there are more than six hundred verses in Scripture that speak explicitly of love. To begin, the creation of human beings was an act of unselfish love by God. He did not need to because He is perfect and needs nothing. But He created us because He knew we would like it. This was an act of love. God exhibited the ultimate act of love when He gave His only Son as the definitive sacrifice to save the world from its sins (Jn 3:16). The Son, Jesus Christ, gave His own life for us when He died on the cross. We are called to this type of unselfish love. Love is most fully expressed when we give ourselves with no interest in gaining something from it. Love is wanting what is best for another simply because it is best for that person! Love is the greatest of virtues. Love is the opposite of selfishness. Love truly makes the world a better place. Without love, we have only emptiness. (My answer continues in the comments)