1. the state or quality of being unsuitable or inappropriate for a particular purpose or role
2. poor physical condition or lack of physical strength and health

Examples

• The candidate’s unfitness for the job became apparent during the interview.
• His unfitness for military service was due to a heart condition.
• The committee questioned her unfitness to serve as treasurer.
• Years of poor diet led to his physical unfitness.
• The unfitness of the building for human habitation was obvious.
• The coach was concerned about the team’s unfitness at the start of the season.