do (someone) a world/lot of good

idiom

Definition of do (someone) a world/lot of good

: to be very useful to or helpful for (someone) The visit with her grandchildren did her a world/lot of good.

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“Do (someone) a world/lot of good.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/do%20%28someone%29%20a%20world%2Flot%20of%20good. Accessed 8 Aug. 2020.

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