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Meaning of rock steady

rock' stead'y

Pronunciation: [key]
  1. the style of vocalized Jamaican popular music that succeeded ska and preceded reggae in the 1960s, influenced by American soul music and having a more upbeat tempo with emphasis on electric bass and guitar rather than on horns.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.