thin /θɪn/ adjective (thinner, thinnest)
DISTANCE › Something that is thin is smaller than usual between its opposite sides: a thin slice of ham The walls are very thin.
PERSON › A thin person or animal has very little fat on their body.
LIQUID › A thin substance or liquid has a lot of water in it and flows easily: thin soup
AMOUNT › having only a small number of people or a small amount of something: Government troops were very thin along the border. His hair is going thin on top.
AIR › Thin air does not have enough oxygen in it. → See also disappear/vanish into thin air → See also be thin on the ground → See also through thick and thin