To which one would say: hmm, the homeless man with perfect organs would have had to have been over 500 years old.
hmm, who are these people standing in front of the machines at the gym, neither occupying them nor not occupying them?
hmm: a question that presupposes a hierarchy, which I am loathe to assign.
hmm, I wonder what it was about Obama that inflamed passions so.
hmm...that's a hard one, because I live in New York City and have access to just about everything and anything.
hmm—he might, although a foreigner, be forced to take a journey to Siberia.
hmm—does our law judge a man without giving him a fair hearing?
"hmm," Rupert murmured, more interested in his letter than in the conversation.
hmm, it's not as fragrant as might be; that is, Not before it's smeared.
"hmm—yes," he continued bending over to inspect the exposed forearm, in spite of Drummond's efforts to twist away.
representative of a sound made during contemplation or showing mild disapproval, attested from 1868, but this is probably a variation of the hum attested in similar senses from 1590s.