Definition of air casing
1 : a casing (as of sheet iron) surrounding a pipe or reservoir with an air space between to prevent transmission of heat
2 : the coaming around the stack of a ship at the weather deck serving to ventilate the boiler room
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 casing
Seen and Heard
What made you want to look up air casing? Please tell us where you read or heard it (including the quote, if possible).