5 definitions
Definition.com
G7 (n.) is a summit where the photo is the deliverable.
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G7 (n.) is a group whose name counts its members because its power no longer can.
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G7 (n.) is seven governments issuing one statement that none of them will be bound by.
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G7 (n.) is a club of rich countries that meets to agree it is still in charge.
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G7 (n.) is the world's economy explained by the part of it that used to run it.