The def is a function and is a short form of Define or Definition in Python. The def function is used in Python to define a function. Wishing to learn and get skilled in Python? Check out the Python course from Intellipaat, as it offers one of the best courses that are industry-aligned along-with several guided projects which would help you in honing your practical side with practice. Also, have a look at our YouTube video on Python Projects for Beginners to get started.