a calamitous event, especially one occurring suddenly and causing great loss of life, damage, or hardship, as a flood, airplane crash, or business failure.
2.
Obsolete. an unfavorable aspect of a star or planet.
Origin: 1585–95; < Middle Frenchdesastre < Italiandisastro, equivalent to dis-dis-1 + astro star < Latinastrum < Greekástron
Related forms
pre·dis·as·ter, noun
Synonyms 1. mischance, misfortune, misadventure, mishap, accident, blow, reverse, adversity, affliction. Disaster, calamity, catastrophe, cataclysm refer to adverse happenings often occurring suddenly and unexpectedly. A disaster may be caused by carelessness, negligence, bad judgment, or the like, or by natural forces, as a hurricane or flood: a railroad disaster.Calamity suggests great affliction, either personal or general; the emphasis is on the grief or sorrow caused: the calamity of losing a child.Catastrophe refers especially to the tragic outcome of a personal or public situation; the emphasis is on the destruction or irreplaceable loss: the catastrophe of a defeat in battle.Cataclysm physically an earth-shaking change, refers to a personal or public upheaval of unparalleled violence: a cataclysm that turned his life in a new direction.
an occurrence that causes great distress or destruction
2.
a thing, project, etc, that fails or has been ruined
[C16 (originally in the sense: malevolent astral influence): from Italian disastro, from dis- (pejorative) + astro star, from Latin astrum, from Greek astron]
1580, from M.Fr. desastre (1564), from It. disastro "ill-starred," from dis- "away, without" + astro "star, planet," from L. astrum, from Gk. astron (see star). The sense is astrological, of a calamity blamed on an unfavorable position of a planet.