rocking UK /ˈɹɒkɪŋ/US /ˈɹɑkɪŋ/noun 3adjective 2forms 3phrases 1 noun3 •The motion of something that rocks. •The abrading of a copper plate with a rocker, preparatory to mezzotinting. •The motion by which the design on a steel mill is transferred to a copper cylinder. adjective2 •Shaking, swaying or moving back and forth. •(informal) Excellent; great. formsrockings · more rocking · most rocking Phrases with rocking rocking horse shitSomething exceedingly rare or, more likely, nonexistent.