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

Toy Story opened over Thanksgiving and amassed $39 million over the long five-day holiday weekend. —Pamela McClintock, HollywoodReporter, 21 June 2025

But then the video went viral, amassing more than 380,000 views and thousands of comments. —Jordan Greene, People.com, 20 June 2025

The bad news is that political will can be hard to amass. —Christine Ro, Forbes.com, 20 June 2025

In spite of high critical praise and a promising opening weekend, the Marvel film only amassed $380 million against a production budget of $180 million, officially flopping. —Michileen Martin, MSNBC Newsweek, 19 June 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