We found 5 dictionaries that define the word magnetic storms:

General (4 matching dictionaries)

1. magnetic storms: Merriam-Webster
2. magnetic storms: Collins English Dictionary
3. magnetic storms: Vocabulary.com
4. magnetic storms: TheFreeDictionary.com

Computing (1 matching dictionary)

5. magnetic storms: Encyclopedia

(Note: See magnetic_storm as well.)

Definitions from Wiktionary (magnetic storm) ▸ noun:  Synonym of geomagnetic storm ▸ Also see magnetic_storm ▸ Words similar to magnetic storms ▸ Usage examples for magnetic storms ▸ Idioms related to magnetic storms ▸ Wikipedia articles (New!) ▸ Words that often appear near magnetic storms ▸ Rhymes of magnetic storms ▸ Invented words related to magnetic storms