thin

adjective (thinner, thinnest)

• 1with opposite surfaces or sides that are close or relatively close together:thin slices of bread a thin line of paint
• (of a garment or other knitted or woven item) made of light material: his thin jacket
• (of a garment or fabric) having become less thick as a result of wear: our clothing was getting thin
• (of writing or printing) consisting of narrow lines:tall, thin lettering

• 2having little, or too little, flesh or fat on the body:a thin, gawky adolescent

• 3having few parts or members relative to the area covered or filled; sparse:a depressingly thin crowd his hair was going thin
• (of the air or a substance in the air) not dense:the thin cold air of the mountains
• Climbing denoting a route on which the holds are small or scarce.

• 4(of a liquid substance) not containing much solid; flowing freely:thin soup

• 5lacking substance or quality; weak or inadequate:the evidence is rather thin
• (of a sound) faint and high-pitched:a thin, reedy little voice
• (of a smile) weak and forced.

adverb

• with little thickness or depth:cut the ham as thin as possible [in combination]:a thin-sliced loaf

verb (thins, thinning, thinned)

• 1make or become less dense, crowded, or numerous: [with object]:the remorseless fire of archers thinned their ranks [no object]:the trees began to thin out (as adjective thinning)thinning hair
• [with object] remove some plants from (a row or area) to allow the others more room to grow:thin out the rows of peas
• make or become more watery in consistency: [with object]:if the soup is too thick, add a little water to thin it down [no object]:the blood thins

• 2make or become smaller in thickness: [with object]:their effect in thinning the ozone layer is probably slowing the global warming trend

• 3 [with object] Golf hit (a ball) above its centre.