fallout

fallout — noun

1. The harmful radioactive material that falls from the sky after a nuclear bomb ex

1.nounB2
Definition

The harmful radioactive material that falls from the sky after a nuclear bomb explodes, settling on the ground and contaminating the area for a long time.

Example

After the 1954 nuclear test, radioactive fallout spread across the nearby islands and into the ocean.

fallout + spread across [area]

Scientists measured the fallout levels in the soil around the abandoned reactor every month.

measure + fallout levels

Common collocations
  • radioactive fallout
  • nuclear fallout
  • fallout shelter
  • fallout zone
  • fallout particles
Synonyms

Grammar Patterns

fallout + spreads / settles

Usage Note

Almost always used as an uncountable noun. Frequently modified by 'radioactive' or 'nuclear' in scientific contexts.

Common Mistakes

A fallout fell on the village.
Radioactive fallout fell on the village.
'fallout' is uncountable; do not use 'a' before it.

2. The negative consequences that spread from a bad event, affecting people or situ

2.nounB2
Definition

The negative consequences that spread from a bad event, affecting people or situations for some time after the event itself is over.

Example

The company faced serious fallout after the data breach exposed millions of customer records.

face + fallout from [event]

The political fallout from the corruption scandal forced three senior ministers to resign.

political fallout + from [event]

Common collocations
  • political fallout
  • economic fallout
  • emotional fallout
  • social fallout
  • fallout from
Synonyms
  • consequences

    neutral — does not carry the same negative weight as 'fallout'

  • repercussions

    more formal, suggests a chain of indirect effects

  • aftermath

    focuses on the period after an event; 'fallout' emphasises the spreading effects themselves

Antonyms
  • benefits

    positive outcomes, opposite of negative spread

  • upside

    informal, refers to the good side of a situation

Grammar Patterns

fallout + from [event]

fallout + of [event]

Usage Note

Commonly modified by an adjective describing the type of consequence: political fallout, economic fallout, social fallout, emotional fallout. The cause is introduced by 'from' or 'of'.

Common Mistakes

The fallout of the meeting were positive.
The fallout from the meeting was positive.
'fallout' is uncountable and describes negative results, so it cannot be used for positive outcomes.

fallout — verb

Word family

  • fall
    verbA1
  • fallout shelter
    nounC1

Synonym discussion

Sense: noun/2

All four words describe results that follow an event, but they differ in tone and focus. "Consequences" is the most neutral term — it can be good or bad, though it often implies a direct causal link. "Aftermath" refers to the period following a destructive event (e.g., a war, a disaster) and carries a sense of清理 and recovery. "Repercussions" are indirect, wide-ranging effects that echo outward from an action, much like ripples in a pond. "Fallout" was originally a nuclear metaphor and retains the sense of something dangerous drifting down over a wide area. Compared to "repercussions," fallout feels more immediate and toxic. For example: "The economic consequences of the policy were mixed" (neutral). "In the aftermath of the earthquake, the city struggled to rebuild" (time-focused). "The scandal had repercussions across the whole industry" (indirect, widespread). "The political fallout from the leak forced the director to resign" (toxic, spreading, personal).

fallout ↗repercussionsaftermath ↗consequences

Common collocations

Nouns

Adverbs

Phrases

  • nuclear fallout
  • radioactive fallout
  • political fallout
  • economic fallout
  • emotional fallout
  • social fallout

Prepositions

Etymology

Old EnglishMiddle EnglishEnglish

Formed by combining the verb 'fall' (from Old English 'feallan') with the adverb 'out' (from Old English 'ūt'). The noun 'fallout' emerged in the 1950s during the Cold War to describe radioactive particles descending after nuclear tests. Before this, the two-word phrasal verb 'fall out' already existed with meanings such as 'to quarrel' (since the 1500s) and 'to leave military formation' (since the 1800s). The metaphorical sense of 'fallout' as 'negative consequences' developed from the nuclear meaning in the 1960s and has since become the word's most common use.