The word forms: go, gone, goes, going, gone posses different grammatical meanings.
But we find one and the same semantic component the process of movement. This is a lexical meaning of the word.
Polysemy
A word having several meanings is called polysemantic. Most English words are polysemantic and it’s an advantage in a language, because the number of sound combination that human speech produce in limited. That’s why polysemy becomes very important in providing the means for enriching vocabulary.