[= hair cut ‘bang’ off; cf. BANG-TAIL.] The front hair cut square across the forehead. (Orig. in U.S.) Hence Banged ppl. a.

1

1880.  Howells, Undisc. Country, viii. 113. His hair cut in front like a young lady’s bang.

2

1880.  Even. Stand., 3 April, 4/4. The present style of banged girl.

3