The semantic evalution constitute a posibility of qualitative growing of the vocabulary. In the proces of historic evolution, a word may name a bigger number of object, factors, actions. In this way take place the semantic extention. The extention is the passing from a particular meaning to a general meaning. She is one from the most frequent semantic changes. She is refering at neologisms, contrary to restriction whichis refering at semantic arhaisms. The oposite to extention is the semantic restriction. The semantic restriction is a proces of passing from a general meaning to a particular meaning. She is speciffic to the polysemantic words then when one or more meaning of the words pass in the sphere of pasive vocabulary, the rest of words continued to bee in the active vocabulary.