Definition of "explainer" []

• Agent noun of explain; one who explains. (noun)

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• "(If you're confused by all these terms, check out our mobile term explainer here.) [GigaOM]"
• "The most helpful explainer is about Default contact groups, which really explains the five contact groups that you can’t delete, rename or change, and the one contact group that drives a lot of office app veterans nuts:"
• "It also doesn't cover restoration costs required under the Natural Resource Damage Assessment, some paraphrase explainer?"