needle - definition and synonyms

noun [countable] 

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  1. 1
    a very thin sharp metal tube used for putting medicine or drugs into your body, or for taking blood out. It is fixed to a plastic tube called a syringe
    share a needle (=use the same needle as someone else to inject drugs):

    People are at risk of disease when they share needles.

  2. 2
    a small thin metal tool that is used for sewing. It has a sharp point at one end and a hole at the other

    a needle and thread

    1. a.
  3. 5
    a very small sharp part on a record player that touches the record and helps to produce the sound

    a record needle

  4. 6
    a very thin sharp leaf that grows on some trees