Definition of "introduce"

introduce

/ˌɪntɹəˈdus/

verb
third-person singular simple present introduces, present participle introducing, simple past and past participle introduced
1. (transitive, of people) To cause (someone) to be acquainted (with someone else).
  Quotations
  His unruly hair was slicked down with water, and as Jessamy introduced him to Miss Brindle his face assumed a cherubic innocence which would immediately have aroused the suspicions of anyone who knew him.
  1967, Barbara Sleigh, Jessamy, Sevenoaks, Kent: Bloomsbury, published 1993, page 96
2. (transitive) To make (something or someone) known by formal announcement or recommendation.
3. (transitive) To add (something) to a system, a mixture, or a container.
4. (transitive) To bring (something) into practice.
  Quotations
  First introduced in Letchworth Garden City in 1909, the roundabout […] proved so popular in Britain that in the 1960s the Transport Research Laboratory developed a miniature version.
  2013 October 5, “The widening gyre”, in The Economist, volume 409, number 8856