1. doubt about the truth or value of something
Usage: British spelling; American spelling is ‘skepticism’
2. the philosophical view that certain knowledge is impossible
Usage: philosophy

Examples

• Her scepticism about the new policy proved justified.
• The scientist approached the unusual results with healthy scepticism.
• Public scepticism toward politicians has increased in recent years.
• His scepticism prevented him from accepting the claims without evidence.
• The philosopher’s scepticism led him to question all assumptions.
• Despite initial scepticism, the project was eventually successful.