Is “Overlock” a Scrabble word?
Yes
OVERLOCK
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 Overlock
/ˈəʊvəˌlɒk/
noun
1.A stitch that sews over the edge of one or two pieces of cloth for edging, hemming or seaming.
verb
1.To stitch in this manner.
2.To make the bolt of a lock go too far.
Synonyms: merrow, overedge, serge