How to Use caffeine in a Sentence

caffeine

noun
Definition of caffeinenext
  • Her doctor told her to avoid caffeine.
  • And then the energy from the caffeine and throw some tunes on and get out there and go for a ride.
    — Greg Presto, Men's Health, 30 Apr. 2022
  • For a small, quick hit of caffeine, learn to drink a strong Cuban coffee.
    — Lois K. Solomon, Sun Sentinel, 31 Aug. 2022
  • In the morning, the house caffeine is oft served with bubbly.
    — Katie Kelly Bell, Robb Report, 2 May 2024
  • Plus, many folks are content with the caffeine rush alone, and the rest is just frippery.
    — Tim Carman, Washington Post, 2 Jan. 2024
  • That's a lot of caffeine to pump into an adult, let alone a kid.
    — Sarah Cottrell, Parents, 11 July 2023
  • Keep the caffeine flowing in the meantime with this chic French press.
    — Jake Henry Smith, Glamour, 17 Sep. 2024
  • Green coffee extract in the drink gives you a bold boost of caffeine.
    — Emily Vanschmus, Better Homes & Gardens, 4 Aug. 2022
  • The general rule is that caffeine has a half-life of about six hours.
    — Johanna Gretschel, SELF, 4 Feb. 2022
  • The extra boost of caffeine on a long theme park day didn’t hurt, either.
    — Esther Carlstone, Parents, 12 Sep. 2023
  • That's of course thanks to the caffeine, a stimulant that can rev up your body's engine for the day.
    — Marisa Cohen, Good Housekeeping, 3 Aug. 2022
  • Anything that helps with the sleepless nights (in this case, caffeine).
    — Chaunie Brusie, Rn, Parents, 18 Jan. 2024
  • Even those who stay away from caffeine are able to indulge in this tasty treat.
    — Ebony Williams, ajc, 6 May 2022
  • This new, frozen version of the fan-favorite fall drink is made with oat milk and has a boost of caffeine.
    — Sabrina Weiss, Peoplemag, 22 Aug. 2023
  • Plus, there's a bit of caffeine in the formula, which the brand says offers a quick pick-me-up.
    — Shanon Maglente, Good Housekeeping, 20 Oct. 2022
  • Plus, a jolt of caffeine in these works to banish puffiness.
    — Sam Peters, ELLE, 14 Nov. 2022
  • After the dates, the next order of business for most will be caffeine.
    — Zaynab Issa, Bon Appétit, 28 Mar. 2022
  • After all, the amount of caffeine in a cup of coffee can vary wildly.
    — CNN, 29 Aug. 2022
  • Each bar contains a small dose of caffeine too at 5mg for a little boost.
    — Good Housekeeping, 29 Mar. 2023
  • Don’t drink caffeine at least 8 to 10 hours before bed.
    — Fox News, 27 June 2022
  • The news comes as the chain has come under heavy criticism for the amount of caffeine in the drinks, which will be removed from the menu.
    — Ct Jones, Rolling Stone, 7 May 2024
  • If the go-to caffeine and hype music just aren’t doing it for you, maybe some words of wisdom from the greats will.
    — Ariel Scotti, Men's Health, 26 July 2023
  • On its website, the fast-food bakery-cafe chain includes the caffeine content for the drinks.
    — Aimee Picchi, CBS News, 24 Oct. 2023
  • Vary serving up treats for those in need of a caffeine, or caffeine-free, break.
    — Georg Szalai, The Hollywood Reporter, 29 June 2024
  • But this bikini queen isn't a fan of ye olde morning caffeine fix.
    — Emily Shiffer, Women's Health, 8 Mar. 2023
  • So during a coffee nap, your brain clears out the adenosine and makes room for caffeine to move in.
    — Sonya Collins, Fortune, 27 Apr. 2022
  • That’s why Morgan and friends have been drinking a lot of coffee, though not so much for the caffeine.
    — Tom Krasovic, San Diego Union-Tribune, 14 Mar. 2022
  • Some people love their caffeine and will drink their coffee at the predawn meal, suhoor.
    — Jocelyn Solis-Moreira, CNN, 10 Mar. 2024
  • His heart hasn’t proved an issue since, with Robinson (who isn’t much of a coffee drinker) chalking it up to taking caffeine shots before matches.
    — The Athletic Uk Staff, The Athletic, 10 Jan. 2025
  • Fruit flies sing, get drunk and can be kept awake with caffeine, suggesting even more similarities between their brains and ours.
    — Joe Spring, Smithsonian Magazine, 20 Dec. 2024

Some of these examples are programmatically compiled from various online sources to illustrate current usage of the word 'caffeine.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

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