Is “Chilliest” a Scrabble word?
Yes
CHILLIEST
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 Chilliest
adjective
1.Cold enough to cause discomfort.
2.Feeling uncomfortably cold.
“I’m getting rather chilly over here – could you shut the window please?”
3.Distant and cool; unfriendly.
“She gave me a chilly look when I made the suggestion.”