To lead or bring in; conduct or usher in: as, to introduce a person into a drawing-room; to introduce foreign produce into a country.To pass in; put in; insert: as, to introduce one's finger into an aperture.To make known, as one person to another, or two persons to each other; make acquainted by personal encounter or by letter; present, with the mention of names and titles.To bring into notice, use, or practice; bring forward for acceptance: as, to introduce a new fashion, or an improved mode of tillage.To bring forward with preliminary or preparatory matter; open to notice: as, to introduce a subject with a long preface.To produce; cause to exist; induce.