Meaning changes in English Abstract: As other languages in the world, English changes as times goes by. English formed and developed over many centuries into the form today. Studying the changing principles of words of English would help us acquire further awareness of English lexicon and do good to our language acquirement. Key words: meaning changes types causes 1. Introduction Vocabulary is the most unstable element of language as it is undergoing constant changes both in content and form. Of course, some meanings remain much the same for a long time because the referents to which they direct us do not change. Frequently, an old form or words are pressed into new service when a new linguistic need is felt. When a word loses its old meaning es to refer to something different, the result is a change in word meaning. Change of meaning refers to the alternation of the meaning of existing words, as well as the addition of new meaning to a particular word. 2. Types of meaning changes Extension of Meaning /Generalization of Meaning It is a process by which a word which originally had a specialized meaning has now e generalized or has extended to cover a broader and often less definite concept. For example,Manuscript originally means handwriting (writing