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Meaning of post-synchronization

post-syn•chro•ni•za•tion

Pronunciation: (pōst"sing-kru-nu-zā'shun), [key]
— n. Motion Pictures, Television.
  1. the recording of dialogue and sound effects in synchronization with the picture after the film has been shot. Also called
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.