If you make a copy of something, like a form or a picture, you have made a replication of it. You might need to mail in a replication of your tax forms when you apply for college financial aid.

When you conduct an experiment, you have to repeat it several times to verify that your hypothesis is correct. Each repetition is one replication. A witty retort to a comment or question is also called a replication. Your replications to the teacher's questions may make your classmates laugh, but your smart mouth is bound to get you in trouble eventually.

Definitions of replication
  1. noun
    the act of making copies
    synonyms: reproduction
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    the act of systematically moving a finely focused beam of light or electrons over a surface in order to produce an image of it for analysis or transmission
    sound reproduction
    the reproduction of sound
    hi-fi, high fidelity
    the reproduction of sound with little or no distortion
    the act of reproducing recorded sound
    type of:
    an act of copying
  2. noun
    (genetics) the process whereby DNA makes a copy of itself before cell division
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    type of:
    biological process, organic process
    a process occurring in living organisms
  3. noun
    copy that is not the original; something that has been copied
    synonyms: replica, reproduction
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    a nonfunctional replica of something else (frequently used as a modifier)
    type of:
    a thing made to be similar or identical to another thing
  4. noun
    a quick reply to a question or remark (especially a witty or critical one)
    synonyms: comeback, counter, rejoinder, retort, return, riposte
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    back talk, backtalk, lip, mouth, sass, sassing
    an impudent or insolent rejoinder
    type of:
    reply, response
    the speech act of continuing a conversational exchange
  5. noun
    (law) a pleading made by a plaintiff in reply to the defendant's plea or answer
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    type of:
    (law) a statement in legal and logical form stating something on behalf of a party to a legal proceeding
  6. noun
    the repetition of a sound resulting from reflection of the sound waves
    synonyms: echo, reverberation, sound reflection
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    the echo of an echo
    type of:
    reflection, reflectivity, reflexion
    the ability to reflect beams or rays
  7. noun
    the repetition of an experiment in order to test the validity of its conclusion
    “scientists will not believe an experimental result until they have seen at least one replication
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    type of:
    repeating, repetition
    the act of doing or performing again
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