Definition of "contractually" [contractually]

• By means of a contract (adverb)

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• "[22] The libertarian view with respect to such external resources is very simple: the owner of a given scarce resource is the person who first homesteaded it - or someone who can trace his title contractually back to the homesteader."
• "They don't charge mailing fees, they do take the payments directly from the publisher and then cut the author a check, which contractually is done within 10 business days although she said Christmas always goofs things up."
• "Use this tool to learn how to format the terms contractually in your SLA."