not permanent; not lasting; "politics is an impermanent factor of life"- James Thurber; "impermanent palm cottages"; "a temperary arrangement"; "temporary housing"
the flash of light that accompanies an electric discharge in the atmosphere (or something resembling such a flash); can scintillate for a second or more
abrupt electric discharge from cloud to cloud or from cloud to earth accompanied by the emission of light
the act of starting a new operation or practice; "he opposed the inauguration of fluoridation"; "the startup of the new factory was delayed by strikes"
the ceremonial induction into a position; "the new president obviously enjoyed his inauguration"