When you make something different then what it was before.For example:
I am going to change my brown hair to blonde hair.
The definition of text effects in Microsoft Word is changing the look of text. It can be done by adding shadows, reflections, or glows and by changing the fill or the outline of the letters.
changing the amount
The official definition of the word movement is "an act of changing physical location or position or of having this changed."
This answer is not going to have a word for word definition from the Merriam-Webster online dictionary (that would be asking to plagiarize). Its definition means to change in an unusual way or sometimes a supernatural way. A caterpillar turning into a butterfly, or a man changing into a werewolf are some examples.
changing
The process of a gas changing into a liquid
The definition of something describes exactly what the word is and how the word can be used. You will also see synonyms for the word and if the word is a noun or adjective when viewing the definition.
The dictionary definition of a word
what is the definition of word-processing package
They pique her when she was changing her dress.
The changing of form or shape, as by stress
a definition of a compound word is jack-ass.