Home › Words › D › decaffeinationdecaffeination/diːˌkæfiːˈneɪʃən/decaffeination means the removal of caffeine.decaffeination is pronounced /diːˌkæfiːˈneɪʃən/.EtymologyFrom de- + caffeine + -ation.nounThe removal of caffeine.e.g.“While Karson and I rested under a tree, I thought of all the things I’d tried, without success, to quell my fears: extreme exercise, decaffeination, deep breathing, blue-green algae.” — 2009 September 20, Victor Lodato, “Psychic Surgery”, in New York Times:Definitions & examples from Wiktionary (CC BY-SA 3.0).Words closest in meaningBy meaning, not spelling — each word's AI semantic fingerprint, nearest first.decaffeinate 82% match — To remove the caffeine from something (especially from coffee). vs decaffeination →decaffeinization 81% match — Synonym of decaffeination. vs decaffeination →decaffeinated 78% match — From which caffeine has been removed (e.g. decaffeinated coffee). vs decaffeination →decaf 78% match — That has caffeine removed. vs decaffeination →decarbonation 71% match — The loss or removal of carbon dioxide from a carbonated beverage. vs decaffeination →decaffeinize 71% match — Synonym of decaffeinate. vs decaffeination →uncaffeinated 66% match — Not caffeinated. vs decaffeination →decarbonization 65% match — The act or process of decarbonizing. vs decaffeination →