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

• accumulate
• assemble
• bulk (up)
• collect
• concentrate
• congregate
• constellate
• corral
• garner
• gather
• group
• lump
• pick up
• round up

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

To his surprise, the video went viral, amassing more than 5 million views and 3,500 comments from users trying to connect him to Vargo. —Jordan Greene, People.com, 18 Mar. 2025

After college, physicians complete four years of medical school and three to seven years of residency and fellowship (7-11 years total), amassing 12,000-16,000 patient care hours. —Spencer Dorn, Forbes, 18 Mar. 2025

Episodes of the Harlan Coben adaptation were watched more than 650 million times last year in the non-UK territories, the firm said, amassing a 42.4% share of the Netflix audience. —Max Goldbart, Deadline, 17 Mar. 2025

The retirement benefits involve a legacy of debt amassed largely over seven decades between 1939 and 2010. —Keith M. Phaneuf, Hartford Courant, 15 Mar. 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