The meaning of PROBABLY is insofar as seems reasonably true, factual, or to be expected : without much doubt. How to use probably in a sentence.

Probably, in species with a worldwide distribution, genetic changes may occur as populations adapt to new regions.

PROBABLY definition: in all likelihood; very likely. See examples of probably used in a sentence.

You use probably to say that a statement is very likely to be true. With a verb phrase consisting of an auxiliary verb and a main verb, put probably after the auxiliary verb.

WordReference Random House Learner's Dictionary of American English © 2025 prob•a•bly /ˈprɑbəbli/ adv. (used to express the opinion that what is said is very likely to come true or be …

Nov 13, 2025 · probably (comparative more probably, superlative most probably) She probably has arrived by now. = She has probably arrived by now. = Probably she has arrived by now. …

Probably means something is likely to happen or be true, but not certain. It expresses uncertainty or a strong possibility, often used when making guesses or predictions.

The word 'probably' originated in the mid-16th century from the Latin word 'probabilis', meaning 'that may be proved'. Over time, it evolved to its current usage in English.

If you say that something is probably the case, you think that it is likely to be the case, although you are not sure.

Definition of probably adverb in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.