Usually means: Prolonged period of excessive heat.
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We found 24 dictionaries that define the word heat wave:

General (18 matching dictionaries)
  1. heat wave: Merriam-Webster
  2. heat wave: Oxford Learner's Dictionaries
  3. heat wave: American Heritage Dictionary of the English Language
  4. heat wave: Collins English Dictionary
  5. heat wave: Vocabulary.com
  6. heat-wave: Wordnik
  7. heat wave: Cambridge Advanced Learner's Dictionary
  8. heat wave: Wiktionary
  9. heat wave: The Wordsmyth English Dictionary-Thesaurus
  10. heat wave: Infoplease Dictionary
  11. heat wave: Dictionary.com
  12. (Love Is Like A) Heat Wave, (Love Is Like a) Heat Wave, Heat Wave (Ahmad Jamal album), Heat Wave (Alphabeat song), Heat Wave (Irving Berlin song), Heat Wave (The Flash), Heat Wave (The Jazz Crusaders album), Heat Wave (comics), Heat Wave (novel), Heat Wave, Heat wave (disambiguation), Heat wave: Wikipedia, the Free Encyclopedia
  13. heat wave: Rhymezone
  14. heat wave: FreeDictionary.org
  15. heat wave: Mnemonic Dictionary
  16. heat wave: TheFreeDictionary.com
  17. heat wave: Longman Dictionary of Contemporary English

Computing (1 matching dictionary)
  1. heat wave: Encyclopedia

Medicine (1 matching dictionary)
  1. heat wave: Medical dictionary

Science (1 matching dictionary)
  1. Weather Glossary (No longer online)

Slang (1 matching dictionary)
  1. Heat Wave: Urban Dictionary

Tech (2 matching dictionaries)
  1. Glossary of Meteorology (No longer online)
  2. National Weather Service Glossary (No longer online)

(Note: See heat_waves as well.)

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Definitions from Wiktionary (heat wave)

▸ noun:  (idiomatic) A period of exceptionally hot weather.
▸ noun:  (US, weather broadcasting) Three consecutive days with daytime high temperature of 90 degrees Fahrenheit or higher.
▸ noun:  An electromagnetic wave in the infrared spectrum.

Similar:
hot spell, hot weather, heatwave, heat, heat storm, heat day, hot flash, hot zone, hot-flash, hothouse, more...

Opposite:
cold spell, cold snap, chill, frost, freeze

Types:
SantAna, Chinook, Foehn, Ghibli, Khamsin, Simoom, Zonda, more...

Phrases:
2022 United Kingdom heat wave, 2021 Western North America heat wave, 1976 British Isles heat wave, 2003 European heat wave, 1936 North American heat wave, more...

Adjectives:
heated, subtorrid, boiling, fervent, warme, fervescent, whot, calid, toasted, baking hot, scorching



▸ Words similar to heat wave

▸ Usage examples for heat wave

▸ Idioms related to heat wave

▸ Wikipedia articles (New!)

▸ Words that often appear near heat wave

▸ Rhymes of heat wave

▸ Invented words related to heat wave

Similar:
hot spell, hot weather, heatwave, heat, heat storm, heat day, hot flash, hot zone, hot-flash, hothouse, more...

Opposite:
cold spell, cold snap, chill, frost, freeze

Types:
SantAna, Chinook, Foehn, Ghibli, Khamsin, Simoom, Zonda, more...

Phrases:
2022 United Kingdom heat wave, 2021 Western North America heat wave, 1976 British Isles heat wave, 2003 European heat wave, 1936 North American heat wave, 2022 heat wave in India and Pakistan, more...

Adjectives:
heated, subtorrid, boiling, fervent, warme, fervescent, whot, calid, toasted, baking hot, scorching



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