needleneedleneedlesneedledneedlingnoun1a small thin piece of metal that you use for sewing cloth: Put the thread through the eye (= hole) of the needle.Look also at knitting needle.2a small thin piece of metal that forms part of an instrument: The compass needle points north.a hypodermic needle (= for taking blood or giving drugs)3a very thin pointed leaf on a tree that stays green all year: pine needles