1. the act of supposing; an assumption or hypothesis
Usage: formal; somewhat archaic

Examples

• His supposal that the company would fail proved incorrect.
• The theory was based on the supposal that all participants would cooperate.
• We proceeded on the supposal that the weather would remain clear.
• Her supposal about the missing funds led to a thorough investigation.
• The supposal that technology would solve all problems was overly optimistic.
• Without any evidence, his supposal remained mere speculation.