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3. Definitions

Before we proceed, let's define some of the common terms.

window

This term has different meanings in different contexts, but in general it refers to a rectangular area somewhere on your display screen.

top-level window

A window that exists independently on your screen. It will be decorated with the standard frame and controls for your system's desktop manager. You can move it around on your desktop. You can generally resize it, although your application can prevent this

widget

The generic term for any of the building blocks that make up an application in a graphical user interface. Examples of widgets: buttons, radiobuttons, text fields, frames, and text labels.

frame

In Tkinter, the Frame widget is the basic unit of organization for complex layouts. A frame is a rectangular area that can contain other widgets.

child, parent

When any widget is created, a parent-child relationship is created. For example, if you place a text label inside a frame, the frame is the parent of the label.