bonjour

In a sentence

• Bonjour, comment allez-vous ?

  Hello, how are you?

  Here, 'bonjour' is used as a formal greeting when meeting someone.

• J'ai dit bonjour au voisin ce matin.

  I said hello to the neighbor this morning.

  In this sentence, 'bonjour' is used to describe the act of greeting someone.

• L'expression 'dire bonjour' est courante en français.

  The expression 'say hello' is common in French.

  Here, 'bonjour' is mentioned as part of an idiomatic expression.