change, alter, vary, modify mean to make or become different. change implies making either an essential difference often amounting to a loss of original identity or a substitution of one thing for another.
To change is to make a material difference so that the thing is distinctly different from what it was: to change one's opinion. To alter is to make some partial change, as in appearance, but usually to preserve the identity: to alter a dress (to change a dress would mean to put on a different one).
to make the form, nature, content, future course, etc., of (something) different from what it is or from what it would be if left alone: to change one's name; to change one's opinion; to change the course of history.
To put or take (a thing) in place of something else; substitute for, replace with, or transfer to another of a similar kind. To change one's clothes, to change jobs.
Undergo a change; become different in essence; losing one's or its original nature "She changed completely as she grew older "; "The weather changed last night "
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The noun change can refer to any thing or state that is different from what it once was. Change is everywhere in life — and in English. The word has numerous senses, both as a noun and verb, and is a part of many common phrases, like "a change of heart."
Definition of change. English dictionary and integrated thesaurus for learners, writers, teachers, and students with advanced, intermediate, and beginner levels.