(usually uncountable, plural syntonies)
- (electronics) A condition in which two oscillators have the same resonant frequency
- A syntonic state.
- "Official demographers hasten to point out that high mortality rates were already a feature of the Brezhnev period, while low fertility rates are after all a sign of social advance, in syntony with Western Europe." London Review of Books, 25 January 2007, p12.