disastrousa.[Cf. F. dsastreux. See Disaster.]1. Full of unpropitious stellar influences; unpropitious; ill-boding.()The moon
In dim eclipse, disastrous twilight sheds. (Milton.)2. Attended with suffering or disaster; very unfortunate; calamitous; ill-fated; ending in utter failure or ruin; as, a disastrous day; a disastrous termination of an undertaking.()Wherein I spake of most disastrous chances. (Shak.)()