Is “Locking” a Scrabble word?
Yes
LOCKING
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 Locking
verb
1.To become fastened in place.
“If you put the brakes on too hard, the wheels will lock.”
2.To fasten with a lock.
“Remember to lock the door when you leave.”
3.To be capable of becoming fastened in place.
“This door locks with a key.”
noun
1.The act by which something is locked.
2.The use of a lock or a mutex to restrict access to a part of the code to at most one process.