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

The site is often visited by tourists and is a monument to the past, the history of slavery, and the wealth amassed by cotton planters in Mississippi. — Literary Hub, 5 Nov. 2026

There are fewer characters and more focus on Sauron (Charlie Vickers), who is amassing power across Middle-earth. — Emily Zemler, Los Angeles Times, 5 Nov. 2026

During his run, Pixar’s feature films have amassed north of $12B at the worldwide box office. — Anthony D'alessandro, Deadline, 4 Nov. 2026

The wins that Democrats amassed on Tuesday night could breathe life into efforts to create some type of a single-payer system. — John Wilkerson, STAT, 4 Nov. 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