- verb to direct something or someone
- A device which serves to direct along a given course. Also, that which serves to indicate, or to regulate operation.
- A material medium whose physical boundaries confine and direct propagating electromagnetic waves. A guide, for instance, may be a hollow metallic conductor, a coaxial cable, a fiber-optic cable, or an atmospheric duct. Guides enable propagation of electromagnetic waves with very little attenuation. Also called waveguide (1).
- A guide (2) consisting of a hollow metal tube, and which is utilized primarily for propagating microwave energy. The cross section of such a tube may have any of various shapes, the most common being rectangular, circular, and elliptical. The waves are propagated along the longitudinal axis. Also called waveguide (2).
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