Definition of probably
: insofar as seems reasonably true, factual, or to be expected : without much doubt is probably happy it will probably rain
Examples of probably in a sentence
The impact probably added all but the last few percent of Earth's mass and set the stage for Earth's and the Moon's subsequent evolution. —Mark Wilson, Physics Today, February 2008
It was no secret that McKay preferred the thrill of victory to the agony of defeat, and that, along with his innocent optimism and snark-free sincerity, probably makes him hopelessly old-fashioned. —Richard Hoffer, Sports Illustrated, 16 June 2008
But what these newly inaugurated gym rats probably don't know is that besides buffing up their bodies for summer, they're also buffing up their brains. —Christen Brownlee, Science News, 25 Feb. 2006
It will probably rain today.
They will probably be here soon.
It was probably the best concert I've ever been to.
There were probably about 150 people at the wedding.
“Are you going to the picnic?” “Probably.”
“Can you finish painting the room today?” “Probably not.”
Origin and Etymology of probably
First Known Use: 1600
PROBABLY Defined for English Language Learners
Definition of probably for English Language Learners
: very likely : almost certainly
PROBABLY Defined for Kids
Definition of probably for Students
: very likely With dark clouds like those, it will probably rain.
Seen and Heard
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