Sock/sɑːk/ Definition 1 of 5Pro Tip 1/3Clothing item Often comes in pairs and has distinct left and right matches. Don't forget to pack both socks, not just one. Pro Tip 2/3Material matters Materials vary. Cotton breathes well; wool is warmer. Choose wool socks for cold weather. Pro Tip 3/3Fashion accessory Colorful or patterned socks can be a fashion statement. He wore striped socks to show his quirky style.