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

Schleifer, who has coached for 29 years and has amassed a 568-117 record, saw the school’s tennis courts dedicated in his honor in January. —Gary Curreri, Sun Sentinel, 2 May 2026

But a search of booking sites shows that rooms are still available — a sign that the fans are either waiting for prices to drop or may not be amassing on Kansas City in the numbers first projected. —Eric Adler, Kansas City Star, 1 May 2026

By the end of its five-year primary mission, Roman is expected to amass a 20,000-terabyte data archive. —Richard Tribou, The Orlando Sentinel, 1 May 2026

Now driving for Scuderia Ferrari, Hamilton has amassed a net worth that comfortably lands in the hundreds of millions with annual earnings north of $70 million, according to Forbes. —Abby Montanez, Robb Report, 1 May 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
• chagas
• crabgrass
• crevasse
• eelgrass
• eyeglass
• groundmass
• harass
• impasse
• jackass

Kids Definition

amass

verb

ə-ˈmas 

: to collect into a mass : accumulate

amasser noun