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balloon

/bəˈluːn//bəˈluːn/·verb
Animated scene
Fig. 1 — Beside a row of steady little bars, one column of cost begins to climb — then bolts, shooting straight up through the dashed budget line and swelling at the top into a bulging red mass of money far above where it should have stopped, an up-arrow flashing alarm.
01Definition

To balloon is to swell rapidly and alarmingly — to grow round and big, fast, and usually past what anyone wants. It is the vivid verb for costs, debts, deficits, and numbers that get out of hand: a repair bill balloons, unemployment balloons, a dispute balloons into a crisis. Named for the thing that blows up round in seconds, it is nearly always intransitive — things balloon; you rarely balloon something — and it carries a clear note of alarm, of an increase running out of control, close to surge and mushroom.

02In use
  • iRepair costs ballooned from a few hundred to several thousand pounds.
  • iiAs deadlines slipped, the project's budget ballooned and began to surge past every estimate.
  • iiiA minor complaint ballooned into a public scandal within days.
03Collocations
  • costs balloon
  • balloon out of control
  • balloon into
  • a ballooning deficit
  • balloon overnight

Family ballooning (adjective) · balloon (noun)

04Relations

=surge, mushroom, expand, snowball, escalate

≠shrink, diminish, deflate

06TOEFL & IELTS

Balloon is a vivid Task 1 and essay verb for sharp, worrying rises — costs, debts, deficits, and numbers that balloon out of control. It is almost always intransitive (costs ballooned; you rarely balloon something) and usually past tense (ballooned). Keep the negative colour in mind: it implies an increase that is excessive or unsustainable, unlike a neutral 'rose' or 'increased'. The common pattern 'balloon into' names what a small thing becomes.

07Asked
What does balloon mean as a verb?
To swell or increase rapidly — fast and round like a balloon blowing up, and usually to an alarming degree. 'Costs ballooned', 'the deficit ballooned'. It is the vivid verb for numbers that grow out of control, well beyond the flat, neutral 'rose' or 'increased'.
What does it mean when costs or debt 'balloon'?
They rise fast and steeply, to a worrying and often unsustainable level — a small bill of two hundred balloons to two thousand. The word says the increase was rapid AND excessive, running past what was expected or affordable, exactly like the cost column in the scene above shooting past the budget line and ballooning out of control.
How do you use 'ballooned' in a sentence?
'Ballooned', the past tense, is the commonest form: 'Unemployment ballooned to fourteen percent.' 'The project's budget ballooned overnight.' 'A minor dispute ballooned into a scandal.' It suits any sharp, worrying rise, especially of figures, costs, or trouble getting out of hand.
Does balloon have a positive or negative connotation?
Negative. To balloon is to grow excessively and out of control, so the word implies the increase is unwelcome and unsustainable. You would not say profits you are pleased about ballooned — you would say they grew or rose. Balloon is reserved for increases that alarm.
What is the difference between balloon and mushroom?
Both mean fast growth, but balloon stresses swelling big and round to an alarming size (costs balloon), while mushroom stresses springing up suddenly and multiplying (suppliers mushroom). Balloon is about one thing over-swelling out of control; mushroom is about sudden spread and sheer numbers.
What are some synonyms for balloon as a verb?
Swell, snowball, escalate, mushroom and soar are the closest. Snowball and escalate share the sense of a small thing growing fast and hard to stop; soar is more neutral, even positive. Balloon keeps the extra note of swelling round, excessive, and out of hand.