ham·​mer·​head | \ ˈha-mər-ˌhed How to pronounce hammerhead (audio) \

Definition of hammerhead

1 : the striking part of a hammer
2 : blockhead
3 : any of a family (Sphyrnidae) of active voracious medium-sized sharks that have the eyes at the ends of lateral extensions of the flattened head — see shark illustration

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Synonyms & Antonyms for hammerhead


airhead, birdbrain, blockhead, bonehead, bubblehead, chowderhead, chucklehead, clodpoll (or clodpole), clot [British], cluck, clunk, cretin, cuddy (or cuddie) [British dialect], deadhead, dim bulb [slang], dimwit, dip, dodo, dolt, donkey, doofus [slang], dope, dork [slang], dullard, dum-dum, dumbbell, dumbhead, dummkopf, dummy, dunce, dunderhead, fathead, gander, golem, goof, goon, half-wit, hardhead, idiot, ignoramus, imbecile, jackass, know-nothing, knucklehead, lamebrain, loggerhead [chiefly dialect], loon, lump, lunkhead, meathead, mome [archaic], moron, mug [chiefly British], mutt, natural, nimrod [slang], nincompoop, ninny, ninnyhammer, nit [chiefly British], nitwit, noddy, noodle, numskull (or numbskull), oaf, pinhead, prat [British], ratbag [chiefly Australian], saphead, schlub (also shlub) [slang], schnook [slang], simpleton, stock, stupe, stupid, thickhead, turkey, woodenhead, yahoo, yo-yo


brain, genius

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Examples of hammerhead in a Sentence

we despair of ever getting those hammerheads to buckle their seat belts without prodding

Recent Examples on the Web

Also in the offing: a giant octopus playing drums, Mr. Momoa emerging from a waterfall in slow motion and Willem Dafoe with dyed eyebrows, riding an enormous hammerhead shark. Ellen Gamerman, WSJ, "The Movies to See This Holiday Season," 17 Nov. 2018 The planes can be found by searching for each aircraft's tail number: great white (N470WN), hammerhead (N705SW), mako (N961WN), tiger shark (N553WN) and bull shark (N947WN). Andrea Leinfelder, Houston Chronicle, "Southwest planes get some teeth to honor Discovery Channel's Shark Week," 9 July 2018 Last year another fisherman, Eric Ozolins, caught a 13-foot hammerhead near Padre Island after a 15-minute fight. Michelle Gant, Fox News, "Fishermen catch 12-foot hammerhead off coast of Texas," 4 June 2018 This isn’t the first big hammerhead caught in the area. Michelle Gant, Fox News, "Fishermen catch 12-foot hammerhead off coast of Texas," 4 June 2018 Invasive hammerheads have been known to wreak havoc in their new homes. Brigit Katz, Smithsonian, "Hammerhead Flatworms Have Been Quietly Invading France for Two Decades," 26 May 2018 Just as hammerhead sharks cruise through lagoons, hammerhead flatworms hunt through soil. Ben Guarino, BostonGlobe.com, "Giant predatory worms invaded France, but scientists just noticed them," 22 May 2018 Walking along Ke’ehi Lagoon in Honolulu on Tuesday, Samuel Etrata spotted a dead baby hammerhead shark, known as a pup, on shore. Don Sweeney, sacbee, "‘Sick to my stomach.’ Someone dumped 100 dead baby hammerhead sharks at Hawaii lagoon," 27 June 2018 Sharks, like the geodes covering this particular hammerhead, date back tens of millions of years, while humans have existed for only 200,000 years. James Charisma, latimes.com, "The hyper-real world of sculptor Erick Swenson comes to life at Honolulu museum," 4 June 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'hammerhead.' 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 hammerhead

1562, in the meaning defined at sense 1

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Time Traveler for hammerhead

The first known use of hammerhead was in 1562

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More Definitions for hammerhead


ham·​mer·​head | \ ˈha-mər-ˌhed How to pronounce hammerhead (audio) \

Kids Definition of hammerhead

: a shark that has a wide flattened head with the eyes spaced widely apart

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Comments on hammerhead

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highly pertinent or appropriate

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