A person or a thing that splits.

A wedge used to cut logs down the middle.

A quarry worker who splits slate into sheets.

(colloquial) A scientist in one of various fields who prefers to split categories such as species or dialects up into smaller groups.

(baseball) A split-finger fastball.

(graphical user interface) A draggable vertical or horizontal bar used to adjust the relative sizes of two adjacent windows.

(US) A wheaten cake split and buttered when hot.

One who splits hairs in argument, etc.

A device with two electrical plugs that plugs into an electrical outlet, effectively converting the electrical outlet into two; socket converter.