Definition of rock out in English:

rock out

informal Perform rock music loudly and vigorously.
More example sentences
  • The Canadian guitar god should have been dressed in a schoolboy uniform as he rocked out like AC/DC throughout the performance.
  • With just a square black stage and some colourful lights, it almost felt like the group were rocking out at their local bar - except for the thousands of screaming hordes.
  • When they aren't rocking out, the band do what they can to encourage their fans to become politically aware and get out to the voting polls.
See parent entry: rock

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Word of the day animalcule
Pronunciation: ˌanəˈmalˌkyo͞ol
noun
a microscopic animal