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Definitions

duplicate

[doo-pli-kit, dyoo-, doo-pli-keyt, dyoo-] / ˈdu plɪ kɪt, ˈdyu-, ˈdu plɪˌkeɪt, ˈdyu- /
ADJECTIVE
matching
Synonyms
STRONG
corresponding duplex equal equivalent same twin
WEAK
alike carbon-copy dualistic duple identic identical indistinguishable self-same tantamount twofold very same
Antonyms
STRONG
different dissimilar mismatched unequal unlike variable
WEAK
unmatching
NOUN
copy, reproduction
Synonyms
STRONGEST
carbon copy duplication photocopy replica replication
STRONG
Photostat Xerox analogue carbon clone companion coordinate copycat correlate counterfeit counterpart ditto double dupe facsimile fake fellow germination imitation knockoff likeness match mate obverse parallel phony pirate reciprocal recurrence repetition ringer second similarity twin
WEAK
chip off the old block counterscript dead ringer lookalike repro spitting image stat
Antonyms
STRONG
difference dissimilarity enemy opposite original reality reverse unlikeness
WEAK
archetype model prototype
VERB
make a copy; repeat
Synonyms
STRONGEST
clone copy imitate mirror replicate reproduce
STRONG
Photostat Xerox counterfeit ditto double dupe echo fake manifold mimeo multiply phony photocopy pirate redo redouble reduplicate remake rework trace
WEAK
act like do a takeoff do again do like dualize go like knock off make like make replica make twofold repro stat take off as
Antonyms
STRONGEST
be original
STRONG
divide

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

A Harvard spokesperson questioned the survey’s methodology and accuracy because it may have allowed duplicate submissions.

From The Wall Street Journal • Apr. 3, 2026

A second analysis focused on 90 duplicate samples to determine whether storage conditions affected accuracy.

From Science Daily • Mar. 31, 2026

The plans include banning duplicate listings, delisting underperforming companies, and rejuvenating a smaller exchange for start-ups.

From Barron's • Mar. 18, 2026

This categorization of roles and responsibilities will naturally reveal which positions are unnecessary because they duplicate others’ work, operate less efficiently, or are simply no longer needed.

From MarketWatch • Jan. 13, 2026

That way everyone wasn’t investing in duplicate equipment or machines that would sit idle until the same time next year.

From "Reaching for the Moon" by Katherine Johnson

From Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.