heat wave

or heat·wave

See more synonyms for heat wave on Thesaurus.com
  1. an air mass of high temperature covering an extended area and moving relatively slowly.
  2. a period of abnormally hot and usually humid weather.

Origin of heat wave

First recorded in 1875–80
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for heat wave

Historical Examples of heat wave

British Dictionary definitions for heat wave

heat wave

  1. a continuous spell of abnormally hot weather
  2. (not in technical use) an extensive slow-moving air mass at a relatively high temperature
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012