1. [n]  (television) showing again some action (especially sports action) that has been recorded on video tape
2. [n]  something (especially a game) that is played again
3. [v]  play again; "We replayed the game"; "replay a point"
4. [v]  repeat a game against the same opponent; "Princeton replayed Harvard"
5. [v]  play again, as of a melody
6. [v]  reproduce a recording on a recorder

Acorn Computers' full-motion video system written by Roger Wilson. Video and sound information are stored in compressed form. Compression is relatively slow but decompression is done in real-time with quality and frame-rate varying with the processing power available, the size of the picture and whether it appears in a window or uses the whole screen.