1. in theory or concept rather than in reality; hypothetically
2. approximately or roughly
Usage: informal

Examples

• The project is notionally complete, but we still need to test it thoroughly.
• She was notionally in charge, though her assistant made most decisions.
• The building is notionally worth two million dollars.
• Notionally, everyone should have equal access to healthcare.
• The fence notionally marks the property boundary.
• He’s notionally the team leader, but rarely attends meetings.