Introduce \In`tro*duce"\, v. t. [imp. & p. p. Introduced; p. pr. & vb. n. Introducing.] [L. introducere, introductum; intro within + ducere to lead. See Intro-, and Duke.] 1. To lead or bring in; to conduct or usher in; as, to introduce a person into a drawing-room. 2. To put (something into a place); to insert; as, to introduce the finger, or a probe. 3. To lead to and make known by formal announcement or recommendation; hence, to cause to be acquainted; as, to introduce strangers; to introduce one person to another. 4. To bring into notice, practice, cultivation, or use; as, to introduce a new fashion, method, or plant. 5. To produce; to cause to exist; to induce. [Obs.] Whosoever introduces habits in children, deserves the care and attention of their governors. --Locke. 6. To open to notice; to begin; to present; as, he introduced the subject with a long preface. Syn: To bring in; usher in; insert; begin; preface.