Definition of bend sinister in English:

bend sinister

noun

Heraldry
  • A broad diagonal stripe from top right to bottom left of a shield (a supposed sign of bastardy)

    • ‘The diminutives of the bend sinister are the scarp, which is half its width; and the baton, half as wide as the scarp and couped.’
    • ‘Having the shield set per bend sinister means there's a bastard somewhere back up the line.’
    • ‘The other problem, of course, is placing a blue bend sinister on a field divided half blue and half yellow.’

Pronunciation:

bend sinister

/ˈˌbend ˈsinəstər/