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"give a name to," originally "make a knight," from late Old English dubbian "knight by striking with a sword" (11c.), a late word, perhaps borrowed from Old French aduber "equip with arms, adorn" (11c.) of uncertain origin, but there are phonetic difficulties. Meaning "provided with a name" is from 1590s. Related: Dubbed; dubbing.
"add or alter sound on film," 1929, shortening of double; so called because it involves re-recording voices onto a soundtrack. The type of re-mixed reggae music was so called from 1974, probably for the same reason. Related: Dubbed; dubbing.
: A flood of dub versions followednoun
A form of reggae music marked by weird, unexpected, and discontinuous sounds: The hypnotic weirdness of such music has helped make dub the most popular form of reggae
[1970s+; probably fr the electronic technique of dubbing, ''doubling,'' sound tracks]
[1920s+; fr double]