"Suicide, from Latin suicidium, is "the act of taking one's own life". Attempted suicide or non-fatal suicidal behavior is self-injury with at least some desire to end one's life that does not result in death. Assisted suicide is when one individual helps another bring about their own death indirectly via providing either advice or the means to the end. This is in contrast to euthanasia, where another person takes a more active role in bringing about a person's death. Suicidal ideation is thoughts of ending one's life but not taking any active efforts to do so. It  may or may not involve exact planning or intent. In a murder-suicide (or homicide-suicide), the individual aims at taking the lives of others at the same time. A special case of this is extended suicide, where the murder is motivated by seeing the murdered persons as an extension of their self. Suicide in which the reason is that the person feels that they are not part of society is known as egoistic suicide". Read further at Wikipedia