1. Incidentally; in the course of doing something else
   "he made this remark in passing"
   - en passant

Encyclopedia: In passing

• propane
• propanediol
• propanoic acid
• propanol
• propanone
• proparoxytone
• propel
• propellant
• propellant explosive
• propellent
• propeller
• speech
• speech act
• speech communication
• speech community
• speech day
• speech defect
• speech disorder
• speech intelligibility
• speech organ
• speech pattern
• speech perception
• speech production
• speech rhythm
• speech sound