From left, to right.

the width is how wide something is

The minimum amount you can leave a door open so that a cat can get in and out without pawing at the door, or pushing it wide open. A good guide is usually the width of your hand.

Someone who's arm is the same width as their wrist, all the way to the shoulder.

the capacity of the brain to 1) take in or learn any new information or 2) contemplate or think about any ideas or plans.

Satisfy an addict to fat and sugar.

Derogatory phrase to describe an over-weight person, almost always referring to a female.