amass

verb

ə-ˈmas 

amassed; amassing; amasses

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.

amasser noun

amassment

ə-ˈmas-mənt 

noun

Synonyms

• collect
• gather
• assemble
• accumulate
• garner

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

Tensions between Washington and Beijing have flared up again in recent weeks, with both sides seeking to amass leverage ahead of critical negotiations. —Anniek Bao, CNBC, 24 Oct. 2025

And all those cameras on Teslas have amassed one of the largest, if not the largest, datasets for robotics today. —Reed Albergotti, semafor.com, 24 Oct. 2025

The big-play Southlake Carroll offense amassed 701 total yards — 445 in the second half — utilizing a balanced attack (395 passing and 306 rushing). —Mike Waters, Fort Worth Star-Telegram, 24 Oct. 2025

The platform currently carries Seasons 1-3 of Victorious, which Netflix says has amassed over 45M views on the streamer since the beginning of 2024. —Nellie Andreeva, Deadline, 24 Oct. 2025

Word History

Etymology

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

First Known Use

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

Rhymes for amass

• alas
• bromegrass
• bypass
• chagas
• crabgrass
• crevasse
• eelgrass
• eyeglass
• groundmass
• harass
• impasse
• jackass

Kids Definition

amass

verb

ə-ˈmas 

: to collect into a mass : accumulate

amasser noun