1. the quality or state of being interested; having or showing concern, curiosity, or involvement in something
Usage: often used in formal or academic contexts; the opposite of disinterestedness
2. bias or partiality arising from personal involvement or stake in an outcome
Usage: often used in legal, ethical, or professional contexts to indicate lack of objectivity

Examples

• The student's interestedness in science was evident from her detailed questions during the lecture.
• The judge recused herself due to her interestedness in the case, as she had a personal connection to one of the parties.
• His interestedness in the project made him an enthusiastic and dedicated team member.
• The committee questioned the witness's interestedness, wondering if his financial stake would influence his testimony.
• Her genuine interestedness in helping others motivated her to volunteer at the community center.
• The lawyer argued that the expert's interestedness in the outcome undermined the credibility of his report.