Tolerance means to bear pain and hardships. It also means to bear those things which one does not like. Islam teaches us to practice tolerance as much as possible.
The greatest tolerance was practiced by our Holy Prophet (PBUH). He never harmed any one and never thought ill of anyone. He is a model of tolerance. At the time of conquest of Makkah, he forgave even the bitterest enemies of Islam. He never spoke a single harsh word of all his life. We as Muslim should follow his golden teachings and practice tolerance as much as possible.