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

That $550 billion target is over twice what Alphabet amasses today. — Shawn Tully, Fortune, 22 Oct. 2026

The event showcased not only its massive draw, but also the reasons why the band has amassed millions of fans worldwide. — Tere Aguilera, Billboard, 21 Oct. 2026

Siddiq’s latest stand-up special, My Father, has amassed over 5 million views since its Father’s Day premiere. — Matt Grobar, Deadline, 20 Oct. 2026

After having run for 128 yards and two scores against Los Angeles, Walker has amassed 655 yards and six touchdowns on the ground while adding two TDs as a receiver. — Rohan Nadkarni, NBC news, 19 Oct. 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