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

• 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

Barreling through the first quarter, Western Hills amassed three more touchdowns from De’Anthony Monroe, Mohammed Soumahoro, and Jeremiah Stribling. —Elijah Flowers, Fort Worth Star-Telegram, 4 Oct. 2025

Around that time, a front-page story in The New York Times detailed how Dundon and others had amassed wealth by packaging risky auto loans made to low-income people and selling those loans as securities for hundreds of millions of dollars. —Tony Schick, ProPublica, 3 Oct. 2025

No one before or since has amassed such a catalog of quirky child behaviors that researchers even today can replicate within individual children. —Celeste Kidd, The Conversation, 3 Oct. 2025

His three adult children have amassed huge social media followings, just like their patriarch. —Cynthia Littleton, Variety, 3 Oct. 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