overflow

1 of 2

verb

over·​flow ˌō-vər-ˈflō 

overflowed; overflowing; overflows

transitive verb

1

: to cover with or as if with water : inundate

2

: to flow over the brim of

3

: to cause to overflow

intransitive verb

1

: to flow over bounds

2

: to fill a space to capacity and spread beyond its limits

the crowd overflowed into the street

overflow

2 of 2

noun

over·​flow ˈō-vər-ˌflō 

1

: a flowing over : inundation

2

: something that flows over : surplus

3

: an outlet or receptacle for surplus liquid

Synonyms

Verb

• overfill

Noun

• alluvion
• bath
• cataclysm
• cataract
• deluge
• flood
• flood tide
• inundation
• Niagara
• spate
• torrent

Examples of overflow in a Sentence

Verb

The river overflowed its banks.

The creek overflows every spring.

The water in the tub overflowed.

Books and papers overflowed his desk.

The paragraph overflowed the page.

Noun

a great overflow of water from the heavy rains swept mud and silt down onto the highway

an overflow of help actually made the job more complicated

Recent Examples on the Web

Verb

The county will provide additional space, bedding and meals at a local church that partners with the Mission this week if its capacity overflows. —Silas Morgan, Orlando Sentinel, 23 Jan. 2025

Outfalls are pipelines or tunnels that discharge municipal or industrial wastewater, storm water and sewer overflows to a body of water, according to the EPA. —Angela Palermo, Idaho Statesman, 18 Jan. 2025

Noun

Should those sites fill up, overflow housing is available to single adults at the Robert C. Marshall Recreation Center at 1201 Pennsylvania Ave., and to families at the former Lois T. Murray Special Education School at 1600 E. Arlington Ave., Randolph said. —Jonathan M. Pitts, Baltimore Sun, 22 Jan. 2025

The overflow room was a who’s who of politicians and personalities: New York City Mayor Eric Adams, a Democrat; YouTube stars like brothers Jake and Logan Paul, OpenAI CEO Sam Altman and podcaster and comedian Theo Von, who interviewed Vice President JD Vance ahead of the election. —Lisa Hagen, Hartford Courant, 21 Jan. 2025

Word History

First Known Use

Verb

before the 12th century, in the meaning defined at transitive sense 1

Noun

1568, in the meaning defined at sense 1

Kids Definition

overflow

1 of 2 verb

over·​flow ˌō-vər-ˈflō 

1

: to cover with or as if with water : inundate

2

: to flow over the brim or top of

the river overflowed its banks

3

: to flow over bounds

the creek overflows every spring

4

: to fill a space up and spread beyond its limits

the paragraph overflowed the page

overflow

2 of 2 noun

over·​flow ˈō-vər-ˌflō 

1

: a flowing over : flood

2

: something that flows over : surplus

3

: an outlet or container for liquid that overflows

Medical Definition

overflow

noun

over·​flow ˈō-vər-ˌflō 

: an excessive flow or amount