Is “Signature” a Scrabble word?
Yes
SIGNATURE
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 Signature
/ˈsɪɡnətʃə/
noun
1.A person's name, written by that person, used as identification or to signify approval of accompanying material, such as a legal contract.
2.An act of signing one's name; an act of producing a signature.
3.The part of a doctor’s prescription containing directions for the patient.
Synonyms: sig, siggy
adjective
1.Distinctive, characteristic, indicative of identity.
“Rabbit in mustard sauce is my signature dish.”