English

Adverb

in all likelihood ‎(not comparable)

1. Very probably; almost certainly.
   • 2014, A teacher, "Choosing a primary school: a teacher's guide for parents", The Guardian, 23 September 2014:

     So if your prospective school is proudly displaying that "We Are Outstanding" banner on its perimeter fence, well, that is wonderful … but do bear in mind that in all likelihood it has been awarded for results in those two subjects, rather than for its delivery of a broad and balanced curriculum which brings out the best in every child. Which is, of course, what makes a great primary school.

   • 1847, Charlotte Bronte, Jane Eyre, ch. 2,

     I can now conjecture readily that this streak of light was, in all likelihood, a gleam from a lantern carried by some one across the lawn.

References

• Oxford English Dictionary, 2nd ed., 1989. See "in all likelihood," under "likelihood."
• "in all likelihood" in the Dictionary.com Unabridged, v1.0.1, Lexico Publishing roup, 2006.