English Reference

Word

tank

US/ˈtæŋk/

UK/tˈæŋk/

Definitions

01liquid container

A2 · Elementary Countable noun

n. a large container for holding liquids or gases, like water or fuel.

n. a large, typically enclosed container designed for the storage of liquids or gases.

“The plumber had to fix a leak in the water tank in the attic.”

“The industrial facility maintains several pressurized tanks to store the liquid nitrogen required for the cooling process.”

02military vehicle

B1 · Intermediate Countable noun

n. a heavy military vehicle with large guns that moves on metal tracks instead of wheels.

n. an armoured fighting vehicle equipped with a large-calibre gun and moving on continuous caterpillar tracks.

“The army moved its tanks to the border during the training exercise.”

“Modern tanks are designed with advanced composite armour to withstand direct hits from anti-tank guided missiles.”

Synonyms

armoured vehicle

03gaming role

C1 · Advanced Countable noun Computing Slang

n. in video games, a character who can take a lot of damage to protect their teammates.

n. a character class in cooperative games designed to absorb damage and draw enemy attention away from more vulnerable allies.

“Our team needs a strong tank to lead the attack on the boss.”

“The player chose a warrior build to act as the primary tank, ensuring the mages could cast spells without being interrupted by enemy fire.”

Synonyms

defendermeat shield

Antonyms

glass cannon

04botany

C2 · Proficiency Countable noun Botany Technical

n. a part of some plants that catches and holds rainwater.

n. a structure formed by overlapping leaves in certain plants, such as bromeliads, used to collect and retain water.

“Frogs often lay their eggs in the water held by the plant's tank.”

“Epiphytic bromeliads rely on their central tank to survive long periods without rainfall in the tropical canopy.”

Synonyms

05to fail

B2 · Upper Intermediate Informal

v. to fail completely or lose value very quickly.

v. to decline sharply in value, performance, or quality; often used in economic or commercial contexts.

“The company's stock started to tank after the bad news was released.”

“Despite a massive marketing budget, the film tanked at the box office during its opening weekend.”

Synonyms

Antonyms

06to lose on purpose

C1 · Advanced Sports Informal

v. to lose a game on purpose to get an advantage later.

v. to deliberately lose a sporting match or competition, typically to secure a better draft pick or future advantage.

“Fans accused the team of tanking the season to get a better player next year.”

“The league investigated whether the coach instructed his players to tank the final game to avoid a difficult opponent in the playoffs.”

Synonyms

Antonyms

Collocations

Common phrases and expressions where native English speakers use the word “tank” in context.

Verb

01. fill the tank

“We should stop at the next gas station to fill the tank before we head into the desert.”

verb + noun

02. tank the economy

“Critics argued that the new tax policy would tank the economy and lead to high unemployment.”

verb + noun

Adjective

03. armored tank

“The museum features a restored armored tank from the Second World War.”

adj + noun

04. septic tank

“Houses in this rural area are not connected to the main sewer and use a septic tank instead.”

adj + noun

Noun

05. think tank

“She works for a prestigious think tank that advises the government on environmental policy.”

noun + noun

06. fish tank

“The children spent hours watching the colorful tropical fish swimming in the tank.”

noun + noun

07. fuel tank

“The mechanic discovered a small leak in the fuel tank that was causing the smell of gasoline.”

noun + noun

08. tank of gas

“A full tank of gas should be enough to get us to the coast and back.”

noun + of + noun

Real-World Examples

“German army tanks and helicopters were providing support.”
The Guardian 14 Aug 2026
“That’s less than it costs to fill the gas tanks of most SUVs.”
Ars Technica 9 Jul 2026
“In the 1970s, the US economy was tanking.”
Ars Technica 10 Aug 2026

Etymology

From Portuguese tanque (“tank, liquid container”), from an Indo-Aryan language, likely Gujarati ટાંકી (ṭā̃kī, “cistern”) or Marathi टांकी (ṭāṅkī). Compare the Arabic verb اِسْتَنْقَعَ (istanqaʕa, “to become stagnant, to stagnate”). In the sense of armoured vehicle, first attested in 1915, prototypes were described as tanks for carrying water to disguise their nature as well as due to physical resemblance.

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

Idioms

Domain

Botany

This entry

Exam level
CambridgeCambridgeCambridge English QualificationsThe exam suite from Cambridge University Press & Assessment, from A1 Movers up to C2 Proficiency. The benchmark names double as CEFR labels.B2 FirstIELTSIELTSInternational English Language Testing SystemThe 0–9 band test co-owned by the British Council, IDP, and Cambridge. Used for university entry, work, and migration.5.5–6.5TOEFL iBTTOEFL iBTTest of English as a Foreign Language, Internet-Based TestETS's academic English test, the standard route for US university admissions. Scored 0–120, with a 1–6 scale since 2026.1–6 scale: 4.0–4.572–94TOEICTOEICTest of English for International CommunicationETS's workplace English test, big in Japan and Korea. Listening & Reading scores 10–990 and tops out at C1.785–944
Frequency
Common
Level
B2 · Upper IntermediateOxford
Updated

QR code

englishreference.com/q/tank

English Reference