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1. Conscientiousness in paying proper attention to a task; giving the degree of care required in a given situation
    
2. Persevering determination to perform a task
   "his diligence won him quick promotions";
   - industriousness, industry
    
3. A diligent effort
   "it is a job requiring serious diligence";
   - application

Derived forms: diligences

Type of: conscientiousness, determination, effort, elbow grease, exertion, painstakingness, purpose, sweat [informal], travail [literary]

Encyclopedia: Diligence