Made formal, official, or according to strict rules; the British past tense spelling of formalized.
Past tense and participle of British 'formalise'. The '-s-' spelling reflects British English conventions established in the 18th-19th centuries.
A 'formalised agreement' is different from a casual handshake deal—it has been transformed through official channels, making it binding and enforceable, which is why courts demand formalised contracts!
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