Hypertext Webster Gateway: "derailment"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Derailment \De*rail"ment\, n.
The act of going off, or the state of being off, the rails of
a railroad.
From WordNet (r) 1.7 (wn)
derailment
n : an accident in which a train runs off its track
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