To introduce something is to bring something new to a situation. If your roommate never cleans up after herself, you might try to introduce some new housekeeping policies. Or, introduce yourself to someone who is looking for a new roommate.

Introduce has a number of related meanings. It’s often used when bringing people together for the first time, as when a talk show host introduces a guest to the audience, or when you introduce a new girlfriend or boyfriend to your parents. Introduce comes from the prefix intro-, meaning "into," and the Latin word ducere, meaning "lead" — just as you may have to lead (or drag) your new sweetheart in to meet your parents.

Definitions of introduce
  1. verb
    bring something new to an environment
    “A new word processor was introduced
    synonyms: innovate
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    phase in
    introduce gradually
    open up, pioneer
    open up an area or prepare a way
    present for the first time to the public
    type of:
    initiate, pioneer
    take the lead or initiative in; participate in the development of
  2. verb
    bring in or establish in a new place or environment
    introduce a rule”
    introduce exotic fruits”
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    type of:
    establish, give
    bring about
  3. verb
    bring in a new person or object into a familiar environment
    “The new secretary introduced a nasty rumor”
    synonyms: bring in
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    introduce or send as immigrants
    carry on the feet and deposit
    introduce or insert (oneself) in a subtle manner
  4. verb
    bring before the public for the first time, as of an actor, song, etc.
    synonyms: bring out
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    type of:
    acquaint, present
    cause to come to know personally
  5. verb
    synonyms: enclose, inclose, insert, put in, stick in
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    insert as a plug
    insert a plug into
    introduce a microorganism into
    set or place in
    put in a glass container
    catheterise, catheterize
    insert a catheter into (a body part)
    put into a cup
    interlard, intersperse
    introduce one's writing or speech with certain expressions
    feed, feed in
    introduce continuously
    insert inconspicuously or quickly or quietly
    insert surreptitiously or without warrant
    inject, shoot
    force or drive (a fluid or gas) into by piercing
    inoculate with microorganisms
    intersperse alternately, as of protective covers for book illustrations
    type of:
    lay, place, pose, position, put, set
    put into a certain place or abstract location
  6. verb
    put before (a body)
    introduce legislation”
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    type of:
    project, propose
    present for consideration, examination, criticism, etc.
  7. verb
    put or introduce into something
    synonyms: enter, infix, insert
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    connect, plug in, plug into
    plug into an outlet
    cannulate, cannulise, cannulize, canulate, intubate
    introduce a cannula or tube into
    enter (data or a program) into a computer
    instil, instill
    enter drop by drop
    embed, engraft, imbed, implant, plant
    fix or set securely or deeply
    insert or squeeze tightly between two people or objects
    graft, transplant
    place the organ of a donor into the body of a recipient
    plant in a pot
    fit together or fit inside
    bury, sink
    embed deeply
    type of:
    cause to be attached
  8. verb
    be a precursor of
    synonyms: inaugurate, usher in
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    type of:
    begin, commence, lead off, start
    set in motion, cause to start
  9. verb
    furnish with a preface or introduction
    synonyms: precede, preface, premise
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    make a preliminary introduction, usually to a formal document
    prologise, prologize, prologuize
    write or speak a prologue
    type of:
    say, state, tell
    express in words
  10. verb
    cause to come to know personally
    introduce the new neighbors to the community”
    synonyms: acquaint, present
    acquaint, familiarise, familiarize
    make familiar or conversant with
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    re-introduce, reintroduce
    introduce anew
    formally present a debutante, a representative of a country, etc.
    bring out
    bring before the public for the first time, as of an actor, song, etc.
    type of:
    impart knowledge of some fact, state or affairs, or event to
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