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

Secretary of State Alexi Giannoulias — who has amassed a suspiciously formidable war chest for someone just running to hold his statewide post — is widely expected to declare. — Alice Yin, Chicago Tribune, 27 June 2026

With the passage of Thursday’s law, both sides have agreed to pull their respective measures from the November ballot, halting campaigns that had both parties amassing tens of millions in funding and blanketing the airwaves with ads. — Rebecca Ellis, Los Angeles Times, 26 June 2026

Seventy million people worldwide have seen the musical, which has been produced in 16 languages and has amassed billions at the box office, according to Broadway World. — R. Daniel Foster, Forbes.com, 26 June 2026

The song amassed early 4 million Spotify streams in its first 24 hours and more than 88 million overall streams since release. — Spin Staff, SPIN, 26 June 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