Locker/ˈlɑːkər/ Definition 1 of 4Pro Tip 1/3Public Privacy Lockers offer personal space in public areas, ensuring privacy and security for belongings. I keep personal items in my gym locker for safety. Pro Tip 2/3Size Variation Lockers can differ in size, larger ones fit sports equipment, smaller for personal items. My school locker is too small for my backpack. Pro Tip 3/3Not Always Locked Despite the name, some lockers may be left unlocked for quick access in some conditions. The lockers at the pool are often left unlocked.