Also found in: Medical.
1. Fit for breathing: respirable air.
2. Having characteristics, especially small size, that result in deposition in the lungs after inhalation: respirable particles.
3. Capable of being metabolized by respiration: a respirable substrate.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.