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

Smead has amassed a large following online with more than 4,000 followers on Facebook. — Kacen Bayless, Kansas City Star, 26 July 2026

Over the past few years, Sofie Birch has amassed a sparkling catalog of bucolic curios on outré labels. — Nina Corcoran, Pitchfork, 24 July 2026

In European mythology and literature, storytellers often portrayed dragons as creatures that amassed enormous wealth without ever using or sharing it, embodying the idea that riches pursued for their own sake can lead to isolation and ruin. — Encyclopedia Britannica, 24 July 2026

In 2025, the IMF reported that, across the globe, companies, households, and countries had amassed $251 trillion in debt. — Eleanor Pringle, Fortune, 24 July 2026

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
• crabgrass
• crevasse
• eelgrass
• eyeglass
• groundmass
• harass
• impasse
• jackass
• landmass

Kids Definition

amass

verb

ə-ˈmas 

: to collect into a mass : accumulate

amasser noun