\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

The men not only outnumbered their female colleagues by 57 percent to 43 percent, but had amassed roughly twice as many followers. Ed Yong, The Atlantic, "The Male Echo Chamber of Political Twitter," 26 June 2018 The coalition, which has received support from the nation's largest teachers union, amassed thousands of signatures over the past month in opposition to the takeover. Mandy Mclaren, The Courier-Journal, "JCPS board will fight back against state takeover in appeal," 29 May 2018 She and her late husband had amassed it as part of a contemporary art collection. Maxine Bernstein,, "Son who stole valuable painting from mom's condo sentenced to federal prison," 22 May 2018 Since then, other companies, like Progress Residential, Main Street Renewal, and Tricon American Homes, have formed, and the industry as a whole has amassed a cache of about 200,000 single-family homes and turned them into rental properties. Jeff Andrews, Curbed, "Wall Street’s new housing frontier: Single-family rental homes," 18 May 2018 Vander Esch redshirted as a Boise State freshman in 2014 and amassed 47 tackles his first two seasons on the field. Dave Southorn, idahostatesman, "Vander Esch's 'incredible journey' continues with the NFL's Dallas Cowboys | Idaho Statesman," 26 Apr. 2018 The high-powered Marriotts Ridge offense amassed just three first-half goals while allowing three times that. Kyle Stackpole, Howard County Times, "Glenelg girls lacrosse hands Marriotts Ridge first loss," 14 Apr. 2018 The tweet quickly went viral, and has now amassed more than 15,800 retweets and 104,260 likes and counting. Perri Ormont Blumberg, Southern Living, "Have You Tried the 'Hobby Lobby Challenge?'," 26 Feb. 2018 Since launching the arguably niche channel in 2015, the duo amassed 11,761 subscribers and their videos garnered almost 1 million views. Kashmira Gander, Newsweek, "Vegan YouTuber Who Claimed Raw Food Cured Her Cancer Dies From Disease," 21 Feb. 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

10 Nov 2018

Look-up Popularity

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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Comments on amass

What made you want to look up amass? Please tell us where you read or heard it (including the quote, if possible).


to clear from alleged fault or guilt

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