\ ə-ˈmas \
amassed; amassing; amasses

Definition of amass

transitive verb

1 : to collect for oneself : accumulate amass a great fortune
2 : to collect into a mass : gather must select rather than simply amass details

intransitive verb

: to come together : assemble Dark clouds amassed over the city.

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Other Words from amass

amasser noun
amassment \ -​mənt \ noun

Examples of amass in a Sentence

They've amassed a wealth of information. amassed a truckload of donations in the course of their canned food drive

Recent Examples on the Web

Recent years have brought a continued focus on amassing larger data in order to train deeper, more accurate networks. Timothy B. Lee, Ars Technica, "How computers got shockingly good at recognizing images," 18 Dec. 2018 On Monday night's episode, Erik, who had amassed $15,800 before the final round, opted for cheeky humor when he was stumped over the Final Jeopardy question. Kayla Keegan, Good Housekeeping, "'Jeopardy!' Contestant Trolled Alex Trebek So Hard on the Show (and Still Won!)," 23 Oct. 2018 The immediate reaction would be to sit James Paxton, Marco Gonzales and Edwin Diaz, who have all amassed career-high innings pitched this season. Ryan Divish, The Seattle Times, "With fading playoff hopes and no exciting September call-ups, Mariners have little to play for," 11 Sep. 2018 The Indians, who amassed eight hits on the night, improved to 46-39 while the Clippers, who tallied 10, dropped to 45-41 on the season. Jordan Guskey, Indianapolis Star, "Indianapolis Indians beat Columbus Clippers 5-2," 7 July 2018 Players who have amassed a career WAR greater than 0.5, as calculated by, are listed in bold. Scott Lauber,, "Johnny Almaraz defends scouting record with Phillies, hopes to find more gems this year," 4 June 2018 The woman who has amassed over 2 million followers and consistently holds brands accountable for overlooking people of color is bringing her expertise and highlighters to Sephora. Shannon Barbour, The Cut, "Jackie Aina’s Highlighters Are Coming to Sephora," 19 Apr. 2018 Roll Call found that California GOP Rep. Darrell Issa - a Cleveland native who amassed a $283 million fortune by running the company that makes Viper car alarm systems - was the nation's wealthiest member of Congress. Sabrina Eaton,, "Rep. Jim Renacci is Ohio's wealthiest Congress member: Where do the other Ohio members rank?," 28 Feb. 2018 Ever since best friends Cathrine Saks and Barbara Potts launched their namesake label in 2013, the savvy designers have been amassing a huge following of It girls and high-profile celebrities. Brooke Bobb, Vogue, "9 Celebrity-Approved Fashion Labels That Made It Big in 2018," 20 Dec. 2018

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

15th century, in the meaning defined at transitive sense 1

History and Etymology for amass

Anglo-French amasser, from a- (from Latin ad-) + masser to gather into a mass, from masse mass

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Statistics for amass

Last Updated

20 Jan 2019

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Time Traveler for amass

The first known use of amass was in the 15th century

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More Definitions for amass



English Language Learners Definition of amass

: to gather or collect (something, such as a large amount of money) especially for yourself


\ ə-ˈmas \
amassed; amassing

Kids Definition of amass

: to collect or gather together The businessman was able to amass a fortune.

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More from Merriam-Webster on amass

Rhyming Dictionary: Words that rhyme with amass

Thesaurus: All synonyms and antonyms for amass

Spanish Central: Translation of amass

Nglish: Translation of amass for Spanish Speakers

Britannica English: Translation of amass for Arabic Speakers

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