Definition: An unexpected natural or man-made catastrophe of substantial extent causing significant physical damage or destruction, loss of life or sometimes permanent change to the natural environment.

Alright class, settle down, let’s take a peek, At ‘disaster,’ a word we need to speak. The dictionary gives us quite a plea, A detailed definition for you and me! It says it's “unexpected,” don’t you see? Something that happens suddenly, wild and free! “Natural or man-made,” the words declare, From storms and floods to troubles we share. "Catastrophe of substantial extent," – a big display, A problem enormous, come what may! “Significant physical damage” – things broken and bent, Structures collapsing, sadly spent. “Loss of life,” a heavy, somber sound, When people are hurt, or no longer around. And sometimes “permanent change to the natural environment," too, Like rivers diverted, skies turning blue... (or gray, it's true!). So basically class, disaster is quite a fright, A serious event that dims the light. Do you understand now, clear and bright? Any questions bubbling up with all your might?