\ ˈrad How to pronounce rad (audio) \

Definition of rad

 (Entry 1 of 3)

: a unit of absorbed dose of ionizing radiation equal to an energy of 100 ergs per gram of irradiated material

Definition of rad (Entry 2 of 3)

Definition of rad (Entry 3 of 3)

1 radian
2 radius
3 radix

Examples of rad in a Sentence

Recent Examples on the Web: Noun Recommendation of the Week: Magic: The Gathering Arena, Wizards of the Coast, on PC Magic: the Gathering is super rad, and super hard to get into. Wired, "The Making of Doom Is Getting a TV Show," 27 Sep. 2019 Stand-out vehicles PW and VD levitate their way out of a 1963 Chevrolet Corvette Grand Sport after driving off a cliff (rad). Peter Opaskar, Ars Technica, "What I learned about cars watching all 8 Fast & Furious movies in 4 days," 2 Aug. 2019 The news sent the shares of drugstore giants CVS Health (cvs, -9.28%), Walgreens Boots Alliance (wba, -9.34%), and Rite Aid (rad, -9.09%) plunging between 8% and 10%. Phil Wahba, Fortune, "Walgreens and CVS Shares Plunge After Amazon Announces Deal to Buy Online Pharmacy PillPack," 28 June 2018 The TRD Pro amplifies those feelings by a factor of rad. Andrew Wendler, Car and Driver, "2019 Toyota 4Runner TRD Pro: Be a Tough Guy, or Just Look Like One," 8 Feb. 2018 There’s so much rad s— happening right now in music. Dave Quinn, PEOPLE.com, "WATCH: Pink Tells Daughter ‘We Don’t Change’ in Inspiring Speech About Self-Acceptance at MTV VMAs," 28 Aug. 2017 Recent Examples on the Web: Adjective For me, everything at Philadelphia’s premier sandwich shop falls in the latter category, starting with this rad T-shirt. Alex Delany, Bon Appétit, "This Restaurant Merch Makes Me Hungry," 5 Nov. 2019 This video is a perfect glimpse of how f—ing happy and rad my birthday is this year. Robyn Merrett, PEOPLE.com, "Demi Lovato Reveals Role in Will Ferrell's New Comedy Film Eurovision," 21 Aug. 2019 Check out the video above to not only see the bloody kill, but to also feast your eyes on a pretty rad and disgusting vine walker. Dalton Ross, EW.com, "Watch an awesome Fear the Walking Dead zombie decapitation," 23 Aug. 2019 Some speedsters need repair, but new paint, a rad name and a little TLC could go the distance. Carolina Gusman, San Diego Union-Tribune, "Volunteers are key to Orange Crate Derby," 15 Aug. 2019 Each ticket includes admission for a team of eight, access to the Tavern Buffet, a pretty rad t-shirt, parking validation, bottled water, and a donation to The Giving Kitchen. Shane Harrison, ajc, "Things to do in and around Atlanta: July 26-Aug. 3," 25 July 2019 In a missionary context, however, Ramsey insists that John’s plans were more rad than crazy. Alex Perry, Outside Online, "The Last Days of John Allen Chau," 24 July 2019 While in town, check out Neon Alley, a rad outdoor art gallery where two dozen neon signs glow. Brittany Anas, The Know, "Stay in a former jail, drive-in theater or goat lodge when visiting Colorado’s most unique hotels," 24 June 2019 The new flow area, designed to the rigorous-rad standards of the Vans Park Series pro tour terrain, offers a deep canyon of banks, bumps and curves that, when navigated correctly, help propel skaters round and round. Barbara Odanaka, latimes.com, "A guide to L.A.’s best skate parks," 7 June 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'rad.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of rad


circa 1953, in the meaning defined above


1982, in the meaning defined above

History and Etymology for rad


radiation absorbed dose

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Time Traveler for rad

Time Traveler

The first known use of rad was circa 1953

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Statistics for rad

Last Updated

22 Nov 2019

Cite this Entry

“Rad.” The Merriam-Webster.com Dictionary, Merriam-Webster Inc., https://www.merriam-webster.com/dictionary/rad. Accessed 7 December 2019.

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More Definitions for rad

English Language Learners Definition of rad

US slang : very appealing or good


\ ˈrad How to pronounce rad (audio) \

Medical Definition of rad

 (Entry 1 of 2)

: a unit of absorbed dose of ionizing radiation equal to an energy of 100 ergs per gram of irradiated material

Medical Definition of rad (Entry 2 of 2)

root used in writing prescriptions

History and Etymology for rad


Latin radix

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More from Merriam-Webster on rad

Rhyming Dictionary: Words that rhyme with rad

Nglish: Translation of rad for Spanish Speakers

Britannica English: Translation of rad for Arabic Speakers

Britannica.com: Encyclopedia article about rad

Comments on rad

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