
Offline editing is part of the post-production process of filmmaking and television production in which raw footage is copied and edited, without affecting the camera original film stock or video tape. Once the project has been completely offline edited, the original media will be assembled in the online editing stage. The term offline originated ...
Found on
http://en.wikipedia.org/wiki/Offline_editing

In video and film, process of editing a scratch copy of the footage rather than the expensively created footage itself. Once the edit has been finalized, the real footage is edited by a machine
Found on
https://www.encyclo.co.uk/local/21221
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