1. the quality or state of being impossible; the fact that something cannot happen or be done

Examples

• The impossibleness of the task became clear once we examined the constraints.
• She struggled with the impossibleness of meeting both deadlines simultaneously.
• The impossibleness of time travel remains a fundamental law of physics.
• He recognized the impossibleness of his dream and adjusted his goals.
• The impossibleness of the situation left them with no viable options.