Definitions:

1. Conveys a state of unwavering attention and purpose, often with a high level of commitment and concentration. NOUN
   • The artist worked with intentness, oblivious to everything happening around him.
2. Refers to the quality of being deeply focused, determined, or absorbed in an activity or thought. NOUN
   • Her intentness in finishing the project showed in her long hours and careful attention to detail.
3. Refers to the state or quality of having one's mind, attention, or focus sharply concentrated on a particular object, task or thought. NOUN
   • The athlete stood at the starting line with fierce intentness, his muscles tense and his mind focused on victory.
4. Reflects a hight level of determination, commitment or earnestness in pursuing a certain goal or aim. NOUN
   • The scientist's intentness on solving the complex equation was evident in her focused expression.

Synonyms:

• attention
• attentiveness
• concentration
• decisiveness
• determination
• diligence
• earnestness
• engrossment
• focus
• seriousness
• solemnity