Is this suicide... Yes or No

1- If a man jumps in front of a car and thereby saves the life of a child, does he commit suicide?

2- When Ghandi starved himself almost to death to change people's thinking and behaviours as well as to make his point and philosophy clear, did he commit suicide?

3- When Jesus refused to answer Pontius Pilatus, did he commit suicide?

4- if a man stops his heart medication and drowns himself by drinking gallons of water, thinning his blood and putting his life at risk, because he does not believe in secrecy but in full transparency and co-operation in solving problems, does he commit suicide? 

What is YOUR answer....?