Definition of "rock"
rock1
/ɹɒk/
noun
countable and uncountable, plural rocks
A formation of minerals, specifically:
(geology) Any natural material with a distinctive composition of minerals.
(US, slang) An unintelligent person, especially one who repeats mistakes.
(US, basketball, slang) A basketball.
rock2
/ɹɒk/
verb
third-person singular simple present rocks, present participle rocking, simple past and past participle rocked