An inch is an imperial unit of length, approximately equal to 2.54 centimetres. There are twelve inches in a foot.

To inch somewhere or to inch something somewhere means to move there very slowly and carefully, or to make something do this.

If you talk about every inch of an area, you are emphasizing that you mean the whole of it.

If you say that someone looks every inch a certain type of person, you are emphasizing that they look exactly like that kind of person.

If someone or something moves inch by inch, they move very slowly and carefully.