The definition of a graph is a diagram showing the relationships between two or more things. An example of graph is a pie chart. Graph is defined as to create a diagram that shows a relationship between two or more things. An example of graph is to create a series of bars on graphing paper.
President Abraham Lincoln - Slavery Abolished: On September 22, 1862 President Abraham Lincoln, United States of America, took the first step to abolish slavery Home President Abraham Lincoln - Slavery Abolished On Sept. 22, 1862, United States of America  issued the preliminary Emancipation Proclamation, declaring all slaves in rebel states should be free as of Jan. 1, 1863.
A+E Networks. The 13th Amendment to the U.S. Constitution officially abolished slavery in America, and was ratified on December 6, 1865, after the conclusion of the American Civil War.