\ ə-ˈmas How to pronounce amass (audio) \
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.

Keep scrolling for more

Other Words from amass

amasser noun
amassment \ ə-​ˈmas-​mənt How to pronounce amassment (audio) \ 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 22-year-old amassed her staggering pre-tax total through a combination of prize money and endorsements, raking in $1.4 million more than Serena Williams over the last 12 months. Ben Church, CNN, "Naomi Osaka becomes highest-paid female athlete in history after earning $37 million last year," 22 May 2020 Launched last summer, Brainbase has already amassed a diverse customer list that includes BuzzFeed, home decor maker Kathy Ireland, and the Vincent Van Gosh museum. Jeff John Roberts, Fortune, "This 23-year old wants to automate your company’s legal work—and his company Brainbase just raised $8 million," 20 May 2020 Smith amassed 47 1/2 sacks and 180 tackles in five years, including 33 1/2 in his first two seasons—an NFL record for the first two years of a player’s career. Jori Epstein, USA TODAY, "DeMarcus Ware sees opportunity for Cowboys' pass rushers to excel in new defensive scheme," 20 May 2020 By producing chips for many of the leading tech companies, TSMC has amassed the technical know-how needed to churn out the smallest, most efficient and powerful semiconductors in the highest volumes. Time, "Taiwanese Chipmaker Plans to Build $12 Billion Factory in Arizona," 15 May 2020 But Wolf also amasses other evidence, including the accounts of colleagues and the remarkable record of their accomplishments even before Biosphere 2. cleveland, "‘Spaceship Earth’ is a captivating look back at Biosphere 2 and life in isolation (review)," 13 May 2020 By producing chips for many of the leading tech companies, TSMC has amassed the technical know-how needed to churn out the smallest, most efficient and powerful semiconductors in the highest volumes. Ian King,, "TSMC Plans $12 Billion U.S. Chip Plant in Victory for Trump," 13 May 2020 So far this year, the government has amassed a $1.4 trillion deficit, whereas the entire fiscal year 2019 deficit was $984 billion. Cassidy Morrison, Washington Examiner, "Top public health officials urge caution as reopening picks up speed," 13 May 2020 Kretinsky’s Vesa Equity Investment amassed a 5 percent holding in Macy’s for strategic investment purposes, according to a securities filing., "Judge throws out lawsuit over Ben & Jerry’s ‘happy cows’," 12 May 2020

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.

See More

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

Keep scrolling for more

Learn More about amass

Time Traveler for amass

Time Traveler

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

See more words from the same century

Statistics for amass

Last Updated

25 May 2020

Cite this Entry

“Amass.” Dictionary, Merriam-Webster, Accessed 5 Jun. 2020.

Keep scrolling for more

More Definitions for amass


How to pronounce amass (audio)

English Language Learners Definition of amass

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


\ ə-ˈmas How to pronounce amass (audio) \
amassed; amassing

Kids Definition of amass

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

Keep scrolling for more

More from Merriam-Webster on amass

Thesaurus: All synonyms and antonyms for amass

Rhyming Dictionary: Words that rhyme with amass

Spanish Central: Translation of amass

Nglish: Translation of amass for Spanish Speakers

Britannica English: Translation of amass for Arabic Speakers

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).


See Definitions and Examples »

Get Word of the Day daily email!

Test Your Vocabulary

May 2020 Words of the Day Quiz

  • a blooming wisteria tree
  • Which is a synonym of exiguous?
Spell It

Can you spell these 10 commonly misspelled words?

Dictionary Devil

Test Your Knowledge - and learn some interesting things along the way.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!