'Threader' definitions:

Definition of 'threader'

(from WordNet)
noun
A blunt needle for threading ribbon through loops [syn: bodkin, threader]

Definition of 'Threader'

From: GCIDE
  • Threader \Thread"er\, n.
  • 1. A device for assisting in threading a needle. [1913 Webster]
  • 2. A tool or machine for forming a thread on a screw or in a nut. [1913 Webster]