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

The five-time All-Pro receiver has amassed 26 touchdowns and nearly 4,500 yards receiving since his 2022 arrival in South Florida. —Miami Herald, 21 Aug. 2025

Caprio’s Instagram account and Facebook profile each amassed 3.4 million followers, while his TikTok had 1.6 million followers. —Miranda Jeyaretnam, Time, 21 Aug. 2025

The Bears amassed 580 yards of total offense, while holding the defending AFC champions to only 180 scrimmage yards. —Mark Lasota, Forbes.com, 21 Aug. 2025

In fact, the industrial ingredient was at once so pervasive that experts estimate around 90 percent of Americans born between 1951 and 1980 amassed problematically high levels of the element in their bloodstreams during childhood. —Andrew Paul, Popular Science, 21 Aug. 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