Is “Multiplayer” a Scrabble word?
Yes
MULTIPLAYER
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 Multiplayer
/ˌmʌltiˈpleɪ̯ə(ɹ)/
noun
1.(games) The feature of a video game where multiple human players play simultaneously.
“I just heard that the game will have multiplayer when it comes out!”
adjective
1.(games) Requiring or allowing multiple human players to play simultaneously.