1. in a way that is legally or officially acceptable
Usage: legal contexts
2. in a way that is logically sound or well-founded

Examples

• The contract was validly signed by both parties.
• She validly argued that the evidence was insufficient.
• The marriage was validly performed according to state law.
• He validly questioned the accuracy of the data.
• The document must be validly notarized to be accepted.
• The researcher validly concluded that more studies were needed.