We found 4 dictionaries that define the word power grids:

General (3 matching dictionaries)

1. power grids: Merriam-Webster
2. power grids: Vocabulary.com
3. Power grids: Wikipedia, the Free Encyclopedia

Computing (1 matching dictionary)

4. Power grids: Encyclopedia

(Note: See power_grid as well.)

Definitions from Wiktionary (power grid) ▸ noun:  The infrastructure for distributing electrical power throughout a region. ▸ Also see power_grid ▸ Words similar to power grids ▸ Usage examples for power grids ▸ Idioms related to power grids ▸ Wikipedia articles (New!) ▸ Words that often appear near power grids ▸ Rhymes of power grids ▸ Invented words related to power grids