hmm
interj. A1 Beginner US //hm// UK //hˈəm// hmm
interj. a sound you make when you are thinking about something or when you are not sure. You use it to show you are hesitating or considering an idea.
interj. an utterance used to express hesitation, doubt, or thoughtful consideration. It typically functions as a conversational filler or a signal that the speaker is processing information.
Hmm, I'm not sure if I can go tonight.
She looked at the menu for a long time and said hmm before choosing the spicy pasta.
The professor paused, looked at the student's complex equation, and uttered a thoughtful 'hmm' before pointing out a small error in the third line.
See hum.
Usage
Often used in written dialogue to represent a pause in speech; the number of 'm's can be increased to show longer thinking time.