1. the quality of being certain or confident about something
2. the quality of having an optimistic or constructive attitude

Examples

• Her positiveness about the project’s success motivated the entire team.
• The coach’s positiveness helped players maintain confidence during difficult games.
• His positiveness in stating the facts left no room for doubt.
• The teacher appreciated the student’s positiveness toward learning new concepts.
• Despite setbacks, she maintained her positiveness about finding a solution.
• The witness spoke with such positiveness that the jury believed her testimony.