Definition of "frictional" [fric•tion•al]

• Relating to, or caused by, friction. (adjective)

Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License

• "British electricity is that high-grade useless long-sparking stuff you get by turning round a glass machine; stuff we used to call frictional electricity."
• "The electricity thus produced is termed frictional electricity."
• "Furthermore, it will be convenient to exclude 'frictional' unemployment from our definition of 'involuntary' unemployment."