adj. Likely to commit, or to attempt to commit, suicide.
adj. Extremely reckless.
n. someone suicidal, someone likely to kill themselves
the GNU version of the Collaborative International Dictionary of English
adj. Partaking of, or of the nature of, the crime or suicide.
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.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
adj. dangerous to yourself or your interests
Word Usage
"The word "ideation" also shows up in the phrase "suicidal ideation," meaning "thinking, often obsessively, about harming yourself.""