Please, help me to understand the following terms along with proper definition and example.
I found some references, but most of them are not clear.
Wikipedia: Genocide is the systematic elimination of all or a significant part of a racial, ethnic, religious, cultural or national group.
OxfordDictionary: The deliberate killing of a large group of people, especially those of a particular nation or ethnic group.
Example: Holocaust, and, Armenian Genocide.
Massacre: ? not clear ?
Oxford: An indiscriminate and brutal slaughter of many people.
Example: Nanking Massacre.
Wikipedia: Mass murder (sometimes interchangeable with "mass destruction") is the act of murdering many people, typically simultaneously or over a relatively short period of time.
Oxford: The murder of a large number of people
Example: ? not clear ?
Mass Killing: ? not clear ?
Example: ? not clear ?
Wikipedia: Homicide is the act of a human being causing the death of another human being. There are both unintentional and intentional homicides. Homicide can be classified into:
(a) Murder,
(b) Manslaughter,
(c) Euthanasia, and,
(d) Execution.
Wikipedia: Murder is the killing of another person without justification or valid excuse, and it is especially the unlawful killing of another person with malice aforethought.
Example: ? not clear ?
Manslaughter: not clear ?
Example: ? not clear ?