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Synonyms

probably

American  
[prob-uh-blee] / ˈprɒb ə bli /

adverb

  1. in all likelihood; very likely.

    He will probably attend.


probably British  
/ ˈprɒbəblɪ /

adverb

  1. (sentence modifier; not used with a negative or in a question) in all likelihood or probability

    I'll probably see you tomorrow

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

  1. I believe such a thing or situation may be the case

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Usage

What does probably mean? Probably means most likely or in all likelihood. Probably is the adverb form of the adjective probable, meaning “very likely to occur or be true.” Probably is used when you think something will happen or turn out to be true, but you’re not certain enough to say it definitely will. Example: My flight will probably arrive within the next few hours, but I can’t guarantee it.

Etymology

Origin of probably

First recorded in 1525–35; probable + -ly

Explanation

If something probably will happen, it's likely. If it probably won't happen, don't get your hopes up. This is a word for things that are likely to happen or just believable. If your dinner is gone and your dog looks guilty, the dog probably jumped on the table to eat it. If someone moved all the furniture around while you were sleeping, you probably would have noticed. Given all the billions of stars in the sky, there's probably life out there, but who knows if we'll ever meet it. You probably like some foods better than others.

Keep Reading on Vocabulary.com

Vocabulary lists containing probably

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

“The BOJ will probably have to sit on its hands and buckle up for unwelcome downside JPY volatility,” Varathan adds.

From The Wall Street Journal • Apr. 28, 2026

WLF prohibited their sale or transfer, though it said they would probably become tradable sometime in the future.

From Los Angeles Times • Apr. 28, 2026

"It is different and at times it is weird and I will probably never get used to it," Wetmore said.

From BBC • Apr. 27, 2026

If investors had to pick one to focus on, it should probably be Big Tech earnings.

From Barron's • Apr. 27, 2026

Honestly, Trey was a lot like Ethan—they’d probably get along great—but Ethan wasn’t Trey.

From "Legendary Frybread Drive-In" by Cynthia Leitich Smith