As a matter of supposition; in the beliefs or according to the claims of some people.(adverb)
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Use "supposedly" in a sentence
"Beyond an intention to make something decadent for women—or "queens" as the "Q" in the name supposedly represents—Mr. Williams confessed why he designed his own adult dairy drink."
"“Useful idiots” was the term supposedly coined by V."
"The term supposedly refers to House and Senate committee leaders, including Nancy Pelosi, who were briefed on the subject by the CIA."