1. the flat surfaces of an object that are not the top, bottom, front, or back
2. the left or right part of something
3. the edge or border of an area

Examples

• The box has six sides.
• She moved to the left side of the room.
• Trees lined both sides of the road.
• The two sides agreed to a ceasefire.
• There are always two sides to every story.
• The restaurant serves great sides like mashed potatoes and green beans.
• He painted all four sides of the fence.
• Both sides of the argument have merit.