Definition of "moll"

The Bat—they called him the Bat. […]. He […] played a lone hand, […]. Most lone wolves had a moll at any rate—women were their ruin—but if the Bat had a moll, not even the grapevine telegraph could locate her.

1920, Mary Roberts Rinehart, Avery Hopwood, chapter I, in The Bat: A Novel from the Play (Dell Book; 241), New York, N.Y.: Dell Publishing Company, page 01

The nostalgic canonization of the Kennedy presidency, the perfect antidote to the Nixon stench, was befouled by the revelation of Jack Kennedy’s mob-moll paramour.

2014 July 31, Frank Rich, “A Distant Mirror”, in The New York Times‎

The bikies ‘molls’ included Susan Lloyd as Tart; Victoria Anoux as Flossie; and Rosalind Talamini as Sunshine.

1979, Eric Reade, History and Heartburn: The Saga of Australian Film, 1896-1978, page 209

‘Oh God!’ groans Julie who once was a bikie moll back in the early seventies. ‘Hope it′s no one I know.’ But the Machismos turn out to be based on a New Zealand gang, which assembled in Australia after her time.

1995, Debra Adelaide, The Hotel Albatross, page 76

Gilling first appeared as the biker′s moll Vanessa in Stone (1974) and the beautiful, evil cabin attendant in Number 96 (1974).

2009, Albert Moran, Errol Vieth, The A to Z of Australian and New Zealand Cinema, page 142