Relating to or serving as a means of communication; intended to convey meaning or information.
From Latin 'communicatorius' (of sharing). Rare in modern English, largely replaced by 'communicative.'
This is an archaic variant of 'communicative'—most linguists would note its disappearance as 'communicatory' had too many syllables and sounded too formal, so English speakers naturally selected the simpler 'communicative.'
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