Definition of needle noun from the Oxford Advanced American Dictionary

      

    needle

     noun
    noun
    NAmE//ˈnidl//
     
    [countable]
     
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    for sewing
  1. 1 a small thin piece of steel that you use for sewing, with a point at one end and a hole for the thread at the other a needle and thread the eye (= hole) of a needle see also pins and needles
  2. for knitting
  3. 2 a long thin piece of plastic or metal with a point at one end that you use for knitting. You usually use two together knitting needles
  4. for drugs
  5. 3a very thin, pointed piece of steel used on the end of a syringe for putting a drug into someone's body, or for taking blood out of it a hypodermic needle
  6. on instrument
  7. 4a thin piece of metal on a scientific instrument that moves to point to the correct measurement or direction The compass needle was pointing north.
  8. on pine tree
  9. 5[usually plural] the thin, hard, pointed leaf of a pine tree
  10. on record player
  11. 6the very small pointed piece of metal that touches a record that is being played in order to produce the sound synonym stylus
  12. Idioms
    a needle in a haystack
     
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    a thing that is almost impossible to find Searching for one man in this city is like looking for a needle in a haystack.
See the Oxford Advanced Learner's Dictionary entry: needle