ppl. a. (UN-1 8.)

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1553.  Brende, Q. Curtius, III. 25. It was the thing that he doubted moste, that they … should inuade the open side of his battaile whiche lay vnflancked towardes them.

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1756.  Home, Douglas, III. iii. 40. Water-wafted armies, whose chief strength Lies in firm foot, unflank’d with warlike horse.

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1870.  Milit. Engineering, I. v. 333. The points selected for assault should be, if possible, unflanked parts of the work.

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