1. Also,flashing point. Physical Chem.the lowest temperature at which a liquid in a specified apparatus will give off sufficient vapor to ignite momentarily on application of a flame.
2. a critical point or stage at which something or someone suddenly causes or creates some significant action: A 10 percent drop in mortgage rates will produce a flash point in the housing market.
3. a critical situation or area having the potential of erupting in sudden violence: The Mideast has been the flash point for a series of conflicts. Also,flash'point".
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.