HMM is an exclamation used to express pause or uncertainty. Learn how to pronounce it, see translations and examples, and find related words and phrases. HMM is an exclamation or interjection used to express hesitation, doubt, or thoughtful consideration. Learn how to pronounce it, see examples of usage, and compare it with other words that begin with H. In texting, “ hmm ” is an interjection used to indicate thoughtfulness, uncertainty, or hesitation. It can have a variety of meanings depending on the context and tone in which it’s used. Here are a few… Hmm is an interjection that expresses thinking or consideration. Learn how to pronounce it and see examples of hmm in sentences from Britannica Dictionary.