Definition of waveguide
: a device (such as a duct, coaxial cable, or glass fiber) designed to confine and direct the propagation of electromagnetic waves (such as light)
especially
: a metal tube for channeling ultrahigh-frequency waves
Test Your Vocabulary
Name That Food
-
- Name these cookies!

Test your knowledge - and maybe learn something along the way.
TAKE THE QUIZ
A daily challenge for crossword fanatics.
TAKE THE QUIZLove words? Need even more definitions?
Merriam-Webster unabridged
Share waveguide
Time Traveler for waveguide
The first known use of waveguide was in 1932
See more words from the same year