amass

1 of 2

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

amassment

2 of 2

noun

amass·​ment ə-ˈma-smənt 

plural -s

: the act or result of amassing : accumulation

Synonyms of amass

Verb

• collect
• gather
• assemble
• accumulate
• garner

Examples of amass in a Sentence

Verb

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

Verb

The former has amassed more than six million views on YouTube, with the latter surpassing two million. — Matt Grobar, Deadline, 8 Oct. 2026

This newest update to the Uerzell comes at a busy time for Birkenstock, which has amassed quite an active release calendar. — Stephen Garner, Footwear News, 8 Oct. 2026

The 82-year-old tech billionaire owns roughly 98 percent of Hawaii’s Lanai, along with two Four Seasons resorts, and has amassed a string of homes along Malibu’s Carbon Beach. — Abby Montanez, Robb Report, 7 Oct. 2026

The $1 billion that Republicans have amassed compares with roughly $579 million held by a comparable collection of major Democratic groups. — Steven Sloan, Los Angeles Times, 7 Oct. 2026

Word History

Etymology

Verb

Anglo-French amasser, from a- (from Latin ad-) + masser to gather into a mass, from masse mass

First Known Use

Verb

15th century, in the meaning defined at transitive sense 1

Noun

1665, in the meaning defined above

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