Is “Tab” a Scrabble word?
Yes
TAB
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 Tab
/tæb/
noun
1.A small flap or strip of material attached to something, for holding, manipulation, identification, opening etc.
2.An ear.
3.(by extension) A navigational widget, resembling a physical tab, for switching between documents or sets of controls.
verb
1.To affix with tabs; to label.