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 of amass

• 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

The video went viral, amassing over 45 million views. —Meredith Wilshere, PEOPLE, 20 Dec. 2025

In total, Jim amassed 262 pages of spreadsheets and a final count of 1,531 pairs of unique socks, with no duplicates. —Joe Brandt, CBS News, 19 Dec. 2025

Charlotte amassed 18 of its 24 total made 3-pointers in the opening two quarters, which fueled an 80-point first half. —Roderick Boone, Charlotte Observer, 19 Dec. 2025

The small Himalayan kingdom has amassed deep bitcoin reserves over the years by converting surplus hydropower into digital tokens. —Alexander Onukwue, semafor.com, 19 Dec. 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