[ verb ri-doo-pli-keyt, -dyoo-; adjective ri-doo-pli-kit, -keyt, -dyoo- ]
/ verb rɪˈdu plɪˌkeɪt, -ˈdyu-; adjective rɪˈdu plɪ kɪt, -ˌkeɪt, -ˈdyu- /

verb (used with object), re·du·pli·cat·ed, re·du·pli·cat·ing.

to double; repeat.
Grammar. to form (a derivative or inflected form) by doubling a specified syllable or other portion of the primitive, sometimes with fixed modifications, as in Greek léloipa “I have left,” leípo “I leave.”

verb (used without object), re·du·pli·cat·ed, re·du·pli·cat·ing.

to become doubled.
Grammar. to become reduplicated.



Origin of reduplicate

1560–70; < Late Latin reduplicātus (past participle of reduplicāre), equivalent to Latin re- re- + duplic(āre) to double + -ātus -ate1 (see duplicate)

Can be confused

redouble reduplicate Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for reduplicate

British Dictionary definitions for reduplicate


verb (rɪˈdjuːplɪˌkeɪt)

to make or become double; repeat
to repeat (a sound or syllable) in a word or (of a sound or syllable) to be repeated, esp in forming inflections in certain languages

adjective (rɪˈdjuːplɪkɪt)

doubled or repeated
(of petals or sepals) having the margins curving outwards

Derived Forms

reduplicative, adjective
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012