the action of dividing or being divided into parts

the splitting of water into its components of hydrogen and oxygen is critical

(of a headache) severe

I woke up with a splitting headache

break or cause to break forcibly into parts, especially into halves or along the grain

the ice cracked and split

split and toast the muffins

(with reference to a group of people) divide into two or more groups

let's split up and find the other two

once again the family was split up

(of one's head) suffer great pain from a headache

my head is splitting

betray the secrets of or inform on someone

I told him I wouldn't split on him

leave a place, especially suddenly

‘Let's split,’ Harvey said