Conforming to accepted standards
It is de rigueur that he should carry some piece of iron on his person.
Insulation includes recycled newspaper, wood, and cotton denim jeans the latter a de rigueur item of clothing among the student community.
A glass of wine at lunchtime with your steak frites, unthinkable in Southwark, is suddenly de rigueur.
steak frites, unthinkable in Southwark, is suddenly de rigueur.
Anchors with ropes and sailboats are de rigueur with nautical themes.