Relating to or characteristic of an exhibitor or the role of displaying things.
From exhibitor + -ial (adjective suffix). The -ial ending is a variant of -al and often creates adjectives with a more formal or specialized feel.
This word is extremely rare—most people would simply say 'the exhibitor's display' rather than 'the exhibitorial display,' showing that formal -ial adjectives don't always catch on even when they're grammatically valid.
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