Decaf is coffee with the stimulant taken out. A decaf please, decaf after six, switch to decaf.
It is not caffeine-free, since the process leaves a small amount, and a large decaf holds about as much as a cup of tea. The Swiss water process removes it without solvents, which is why it costs more.
1noundecafCoffee with the stimulant taken out.
“I'll have a decaf, please, or I won't sleep tonight.”
decaf is a coffee.
A shortening of decaffeinated, itself de- plus caffeine, from French cafe.
a clipping of decaffeinated.
Etymology from Wiktionary, CC BY-SA