1. in a way that allows two or more things to be used, substituted, or referred to in place of each other without significant difference in meaning or function

Examples

• The terms 'smartphone' and 'mobile phone' are often used interchangeably in modern English.
• These two software packages can be used interchangeably for basic graphic design tasks.
• The words 'happy' and 'joyful' are not always interchangeably used; they have slightly different connotations.
• In casual conversation, people use 'movie' and 'film' interchangeably.
• The two ingredients can be substituted interchangeably in this recipe without affecting the taste.
• These battery types are not interchangeably compatible with all devices.