1979, Jocelyn Paine, "The partnership of artist and audience," Anchorage Daily News, 13 April, p. D1 (retrieved 24 Aug. 2010):Artist and audience are bound together in a three-legged race, sometimes reluctant partners, sometimes joyful in synchroneity.
(countable) A particularinstance of objects, events, scientific data, etc. being in this state.
1985, Richard J. Chorley et al., Geomorphology, ISBN 9780416325904, p. 539:Variously generated temperature curves for different localities do not always exhibit clear synchroneities.