First Cousin: Your first cousins are the people in your family who have at least one of the same grandparents as you. In other words, they are the children of your aunts and uncles.
Second Cousin: Your second cousins are the people in your family who share the same great-grandparent with you.
Third, Fourth, and Fifth Cousins: Your third cousins share at least one great-great-grandparent; fourth cousins share a great-great-great-grandparent, and so on.
Removed: When the word "removed" is used to describe a relationship, it indicates that the two people are from different generations. "Once removed" indicates a difference of one generation, "twice removed" indicates a difference of two generations, and so forth.