1. able to be questioned, disputed, or contested
2. able to be objected to or rejected, especially in a legal or formal context
Usage: legal

Examples

• The witness's testimony was challengeable due to inconsistencies in her account.
• His claim that he invented the device is challengeable; several others have made similar claims.
• The court ruled that the evidence was challengeable and could be excluded from trial.
• These assumptions are challengeable and should be examined more carefully.
• The decision is challengeable under the new regulations.
• Her credentials were challengeable because she had not completed the required certification.