Side locks, also known as sideburns or sidelocks (depending on style and cultural context), are sections of hair that grow down the sides of the face in front of the ears. They are part of the hairline and can vary widely in length, thickness, and style depending on individual preference, cultural traditions, or fashion trends.

In a general grooming context, side locks help frame the face and contribute to the overall hairstyle. They can be blended seamlessly with the rest of the hair or left longer to create a distinct look. Men often style side locks as sideburns, which can range from short and subtle to long and dramatic, while women may use side locks to soften the facial outline or complement certain hairstyles.

Culturally, side locks hold specific significance in various communities. For example, in Orthodox Judaism, "payot" are long sidelocks worn as a religious observance. In other cultures and historical periods, side locks or sideburns were symbols of status, masculinity, or rebellion.