Is “Mm” a Scrabble word?
Yes
MM
Valid in at least one Scrabble dictionary
Valid in these dictionaries
SOWPODS / CSW
Scrabble UK & International
TWL / NWL
Scrabble North America
Large English Dictionary
General English word list
Meaning of Mm
interjection
1.An expression used to show contentment for something
“Mmm, this is a tasty pie!”
2.An expression used to show thought or reflection
“Mmm, I see what you mean.”
3.An expression used to show being muffled or not able to speak clearly, as well as "mmph".
noun
1.A period into which a year is divided, historically based on the phases of the moon.
“July is my favourite month.”
2.A period of 30 days, 31 days, or some alternation thereof.
“We went on holiday for two months.”
3.(in the plural) A woman's period; menstrual discharge.