What's Trending Now
More Trending Words
air gap
noun
Definition of air gap
1 : an air-filled gap in a magnetic or electric circuit (as the space between the field-magnet poles and the armature in a dynamo or motor)
2 : wind gap
3 : the vertical distance between the point where water enters a plumbing fixture (as a tub) and the level at which it would overflow
Indulge Your Inner Word Nerd
There's more!
Love words? You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.
Start your free trial today and get unlimited access to America's largest dictionary, with:
- More than 250,000 words that aren't in our free dictionary
- Expanded definitions, etymologies, and usage notes
- Advanced search features
- Ad free!
First Known Use of air gap
1878
Seen and Heard
What made you want to look up air gap? Please tell us where you read or heard it (including the quote, if possible).
Writing? Check your grammar now!