mm
interjectionUK /m̩/
US /m̩/
A sound you make with your mouth closed to show you are thinking or agree.
Mm, that cake smells really good.
OTHER MEANINGS
2. A very small unit of length equal to one thousandth of a meter.
The screw is only 5 mm long.
3. A written short form for millimeter.
Use a 10 mm wrench for this bolt.
4. A sound made to show you are listening or thinking.
Mm, I see what you mean.