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Meaning of transonic

tran•son•ic

Pronunciation: (tran-son'ik), [key]
— adj. Chiefly Aeron.
  1. close to the speed of propagation of sound; moving at 700–780 mph (1127–1255 km/h) at sea level.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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