Definition: element is a
basic, essential part of something.
In science, it is a pure substance made of only one type of atom.
More generally, it refers to a fundamental component that contributes to a whole.Characteristics: Basic, cannot be broken down into simpler parts, contributes to structure or function of something larger. A building block of the design.
Examples: Logo, images, illustrations, icons, colour schemes, fonts/text (typography), buttons, menus etc...
Non-Examples: The finished product as a whole, the client brief, feedback from the user, an idea
Don't forget that the word element has specific meaning in certain fields (science) but in Imedia it is about being a part of the actual design/product