1. not used up or consumed; remaining available
2. not expended or disbursed (especially of money)

Examples

• The company returned the unspent portion of the grant to the foundation.
• She had unspent energy after her morning workout.
• The budget showed several thousand dollars in unspent funds.
• His unspent vacation days carried over to the next year.
• The battery still had unspent power after the long trip.
• The department’s unspent allocation was redistributed to other programs.