What does Dropdown Menu mean?

Dropdown Menu meaning in Computer Science Dictionary

often referred to as a pull-down menu, drop straight down number, or drop straight down box, a dropdown selection is a menu that appears whenever hitting a button or text choice. As an example, numerous programs have a "File" drop straight down menu at the very top remaining of their screen. Simply clicking the "File" text makes a new selection with additional choices. Here is a good example of a drop down menu as a questionnaire element within browser.