caffeinated

American  

[kaf-uh-ney-tid] / ˈkæf əˌneɪ tɪd /

adjective

1. containing caffeine.

   a caffeinated soft drink.

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verb

1. the simple past tense and past participle of caffeinate.

caffeinated British  

/ ˈkæfɪˌneɪtəd /

adjective

1. 1. with no natural caffeine removed

   2. with added caffeine

2. highly stimulated by caffeine

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Etymology

Origin of caffeinated

caffeine + -ate ¹ + -ed ²

Explanation

Use caffeinated to describe anything that contains the stimulant typically found in coffee, like your caffeinated iced tea or your caffeinated co-workers who drink lattes all day. If you're drinking a beverage that has caffeine in it, it's caffeinated — and now, so are you! Tea and coffee are naturally caffeinated; in fact, if they're specifically described as caffeinated, it's to distinguish them from decaffeinated varieties, in which the caffeine has been removed. Caffeinated is from caffeine, which was coined by a 19th-century chemist from Kaffee, "coffee" in German, and the chemical suffix -ine.

Example Sentences

See Examples For:

caffeinated

The researchers also highlighted the limited evidence available for caffeinated energy drinks and other increasingly popular caffeine products.

From Science Daily ● Jul. 22, 2026

Even so, tea consumption has been associated with reduced risks of atrial fibrillation, heart failure and stroke, similar to caffeinated coffee.

From Science Daily ● Jul. 22, 2026

People who regularly consume larger amounts of caffeinated coffee may gradually develop a tolerance.

From Science Daily ● Jul. 22, 2026

People tend to exercise more on the days they have caffeinated coffee.

From The Wall Street Journal ● Jul. 20, 2026

If Mr. Bunny had been taking human growth hormones and was overly caffeinated.

From "Lawn Boy Returns" by Gary Paulsen