So in summation: supposably is a word, it has a meaning (“as may be conceived or imagined”) that is distinct from most uses of supposedly, but most people who use it nowadays might be better served by using supposedly instead.

Is Supposably a word in the dictionary?

What does it mean? Supposably means capable of being supposed. In other words, it describes something that's capable of happening. Though supposably is a valid word, it can be tricky to use in a sentence, and isn't often used in modern speech.

Was Supposably added to the dictionary?

Dictionary.com says the adverb "supposably" means "as may be assumed, imagined, or supposed." It describes "finna" as "a phonetic spelling representing the African American Vernacular English variant of fixing to." ...