The context of programming languages, semantics refers to the meaning of the code. In other words, it's the study of how the code behaves and what it does, as opposed to its syntax, which is the study of how the code is structured. In Python, semantics is concerned with understanding how the language's constructs, such as variables, data types, control flow statements, functions, and modules, behave when executed. This includes: 1. Variable binding: how variables are assigned values and used in the code. 2. Data types: how different data types, like numbers, strings, and lists, are treated and operated on. 3. Control flow: how the program's execution path is determined by conditional statements and loops. 4. Functions: how functions are defined, called, and return values. 5. Modules: how code is organized and reused through modules and packages.