Definition of "calamitous" [ca•lam•i•tous]

• Causing or involving calamity; disastrous. (adjective)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "By this it appears that it was advisable and seasonable only in calamitous times, and times of present distress, 1"
• "To give to them who are thus marked an assurance of God's favour, that they may know it themselves; and the comfort of knowing it will be the most powerful support and cordial in calamitous times."
• "Such an attack would truly be "calamitous" -- to use the same description as the Chairman of the U.S. Joint Chiefs of Staff, Admiral Michael Mullen."