adjective.
Considering or desiring to commit suicide.
adjective.
Relating to suicide.
adjective.
Dangerous to oneself or to one's interests; self-destructive or ruinous.
The Century Dictionary and Cyclopedia
Partaking or being of the nature of the crime of suicide; suggestive of suicide; leading to suicide: as, suicidal mania; hence, figuratively, destructive of one's aims or interests; self-destructive: as, a suicidal business policy.
the GNU version of the Collaborative International Dictionary of English
adjective.
Partaking of, or of the nature of, the crime or suicide.