millimetre(s)

used to express contentment or pleasure

mmm, that pizza looks so good

mm, I love the sun

used to express uncertainty or reflection

mmm, I haven't read the whole article but I don't really like the sound of this

a metric unit of length equal to one thousandth of a metre

(in the UK and Commonwealth countries) a decoration for distinguished active service on land, instituted in 1916 (originally for enlisted soldiers)

Maelzel's metronome (an indication of tempo in music, given as the number of beats per minute)

Messieurs

(in the UK) Military Medal