Definition of "heat-wave" [heat-wave]

• A day or series of days of unusually hot weather; a hot wave; a broad area of descending wind, dynamically warmed by compression, moving eastward over the United States and often occupying several days in its transit. (noun)
• In physical, an ether-wave capable, by the transformation of the energy of the vibratory disturbance into heat, of raising the temperature of bodies placed in its path. (noun)

The Century Dictionary (Public Domain)

• "The heat-wave at the end of September also brought unwelcome summertime smog to the UK and set a new pollution record for October."
• "Council to dig into heat-wave power outages (WTOP)"
• "Fenty hasn't signed bill banning heat-wave power shutoffs (WJLA-TV)"