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certified mail

noun

uninsured first-class mail requiring proof of delivery.

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You may have read the word "simmer" in a recipe or two, but what does it really mean?
To cook in water that begins cold and then reaches a boil.
To stew in a sauce for a long time.
To cook in water, just below boiling temperature.
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Origin of certified mail

First recorded in 1950–55

Words nearby certified mail

certification, certification mark, certified, certified accountant, certified check, certified mail, certified milk, certified pasteurized milk, certified professional secretary, certified public accountant, certify
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020