Euthanasia is defined as causing death to end suffering.(noun)
An example of euthanasia is when you give a person a lethal dose of pain medication because the person is dying from cancer and doesn't want to live any more.
See euthanasia in Webster's New World College Dictionary
Origin: Gr, painless, happy death < eu- (see eu-) + thanatos, death: see dull
See euthanasia in American Heritage Dictionary 4
Origin: Greek euthanasiā, a good death
Origin: : eu-, eu-
Origin: + thanatos, death.
Learn more about euthanasia