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in all probability

in all probability

8 3.8
Very likely to happen or be true
  • idiom
translation icon : probablemente
  • The weather forecast predicts that, in all probability, it will rain tomorrow.

I learned that in all probability I have not been meeting the needs which you have.

Examples

  • In all probability, "Sir Spider" was a nickname he'd picked up at school.

    Fiction book (1990)
  • Well, you better get a bed and some canned food because in all probability, you'll be there for three or four months.

  • The 10 guilty men who go free will, in all probability, kill again.

  • And in all probability I'll be very happy to give her to you.

  • In all probability, he hates you.

  • In all probability, however, it is a move toward a more equitable balance of forces, not interests.

    Academic text (1991)
  • In all probability, the way Catherine was feeling now, she would outlive even her daughter.

    Fiction book (1995)
  • In all probability, fear and panic had stirred in him the inspiration characteristic of great builders.

    Fiction book (2000)
  • Factions in the PLA have been identified, and in all probability, grievous tensions will continue in China throughout the 1990s.

    Academic text (1991)
  • Ugg boots are one example of footwear that has not eliminated itself from trend and in all probability won't.

    Blog text (26)

Synonyms

probably
vsin all probability
1.0

Likely to happen or be true but not certain

is stronger, signaling almost certain outcome rather than reasonable expectation
likely
vsin all probability
786 1.0

There is a good chance it will happen

is more forceful, implying near certainty rather than mere expectation
chances are
vsin all probability
  • Informal
81 3.2

It is likely that something will happen

is firmer, suggesting a higher degree of certainty than a casual expectation
in all likelihood
vsin all probability
24 3.2

Very likely to happen or be true

is the same meaning but uses a different phrasing for effect
odds are good
vsin all probability
  • Informal
2 3.7

There is a good chance it will happen

is stronger, indicating near certainty rather than only a favorable situation
ten to one
vsin all probability
  • Informal
1 3.7

Very likely to happen

is the same high certainty but expressed in neutral descriptive language
a pound to a penny
vsin all probability
  • UK
8.7

Very likely to happen

is more neutral and less emotionally emphatic in tone
belike
vsin all probability
  • Archaic
9.9

Very likely to be true

is slightly stronger, expressing near certainty rather than mere possibility

Antonyms

487 1.9

People do not expect it to happen or be true

53 4.9

Not likely to happen or be true

How Likely

certainly
1.0
in all probability
8 3.8
probably
1.0
possibly
1.0

Surface Forms

Morphology

in + all + probability

The phrase directly combines 'probability' (likelihood) with the quantifier 'all' and the preposition 'in' to indicate something falls within the overall likelihood, yielding 'very likely' or 'almost certainly'. This compositional pattern is transparent and cross-linguistically paralleled, so a B1 learner who knows the constituent words can readily infer the meaning.

Etymology

In all probability comes from the simple idea of looking at all the signs and chances together and judging the overall probability. So, when people say in all probability, they mean 'very likely'.