1. existing only in theory or as an idea; not real or actual
2. approximate or rough, used for calculation purposes
Usage: often used in finance or business

Examples

• The plan exists only as a notional concept at this stage.
• We discussed the notional benefits of the new policy.
• The notional value of the contract is one million dollars.
• His understanding of physics remains largely notional.
• The architect presented a notional design for the building.
• They calculated a notional profit based on projected sales.
• The notional boundary between the two properties was disputed.