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

Bronin took the other 25, amassing a 10,000-vote victory margin, 54%. — Kevin Rennie, Hartford Courant, 15 Aug. 2026

Roman Karkosik, an entrepreneur whose ventures included plastic-bottle manufacturing in the 1990s, amassed a fortune through investments on the Warsaw Stock Exchange to became one of Poland’s wealthiest individuals. — ABC News, 15 Aug. 2026

As of July, Hochul’s political operation has amassed a war chest that is nine times as large as Blakeman’s. — David Sivak, The Washington Examiner, 15 Aug. 2026

Before the war began, oil markets were oversupplied, inventories were relatively high, Saudi Arabia and the United Arab Emirates had built pipelines around the strait, and governments and companies had amassed emergency and commercial stocks. — Jason Bordoff, Foreign Affairs, 14 Aug. 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