Definitions
1.AdjectivePertaining to suicide."He is an authority on the precursors of suicidal behavior."
2.AdjectiveOf a person, likely to commit, or to attempt to commit, suicide."After losing his job, his wife, and his leg in a single week, he became suicidal."
3.AdjectiveOf a voluntarily-chosen course of action, highly likely to certain to result in the deaths of the participants; dangerous or reckless to such a degree as to be tantamount to suicide for those taking part.
4.AdjectiveExtremely reckless."His driving habits are utterly suicidal."
5.NounSomeone suicidal; someone likely to kill themselves.