Dictionary.com
Thesaurus.com

prepone

American  
[pree-pohn] / priˈpoʊn /

verb (used with object)

Indian English.
preponed, preponing

  1. to reschedule to an earlier day or time.

    Our Wednesday meeting has been preponed to Tuesday afternoon at 3:00.
prepone British  
/ priːˈpəʊn /

verb

  1. to bring forward to an earlier time

"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

Etymology

Origin of prepone

First recorded in 1970–75; pre- + (post)pone

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.