(physics) A change in the wavelength of light, in which the wavelength is longer than when it was emitted at the source.

In electric arc testing, a material response evidenced by the formation of one or more holes in the material which may allow thermal energy to pass through the material.

(informal) Alternative form of on the regular

A small bag, typically made of cloth, vinyl, or some other pliable material, used for carrying items when walking.