Correct spelling, explanation: the word toilet comes from the French word toilette and it appeared in English in the 16th century. Originally, the word toilet referred to a wrapper, for example for clothes. The meaning that we know today evolved in the 20th century.

Definition of toilet:
1. noun – a bathroom,
Excuse me, can you tell me where the toilet is?
2. noun – a device in the bathroom used to urinate or to empty your body of solid waste,
I was on the toilet when somebody knocked on the door.
3. noun – washing and dressing,
She spent hours over her toilet so she looked really beautiful.

Expressions with toilet:
Some typical expressions include toilet paper, toilet soap, and toilet brush:
Don’t forget to buy toilet paper when you’re in the supermarket.
This toilet soap is mild and it smells so nice.
After using the toilet remember to clean it with the toilet brush.

Incorrect spelling, explanation: the word toilet has a French origin, which is visible in the pronunciation and spelling. However, many learners and native users of English make a mistake in spelling the word as toliet. The form is wrong, though, and the only correct spelling is toilet.