In a manner that is binding or obligatory; in a way that creates a legal or moral obligation.
From 'binding' (adjective, from 'bind') + '-ly' (adverbial suffix). The word combines a legal concept with standard English adverb formation to describe something done in an obligatory manner.
When a contract is bindingly agreed, you've literally created a promise that the law will enforce—the word itself sounds formal because it carries real legal weight. Understanding the difference between 'bindingly' agreed and just 'suggested' is the difference between a contract and friendly advice.
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