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

Between retirement savings, eventual home ownership and inheritance, millennials and Zoomers will eventually amass enormous wealth, researchers say. —Daniel De Visé, USA Today, 9 May 2026

Across the years, Bischofberger amassed a vast collection of design objects by artists ranging from Le Corbusier to Jean Prouvé. —Alex Greenberger, ARTnews.com, 9 May 2026

This week, the separatist group Stay Free Alberta submitted a petition for a referendum on the issue that had amassed 302,000 signatures – well ahead of the 178,000 (10% of eligible voters) required for the authorities to consider such a vote. —Harriet Marsden, TheWeek, 7 May 2026

Eloise amassed more than 30,000 followers posting videos of herself riding on TikTok. —Elise Taylor, Vanity Fair, 7 May 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
• chagas
• crabgrass
• crevasse
• eelgrass
• eyeglass
• groundmass
• harass
• impasse
• jackass

Kids Definition

amass

verb

ə-ˈmas 

: to collect into a mass : accumulate

amasser noun