From A to Z: thoroughly, completely, including everything; from the beginning to the end 1Jarvie, Gordon. Bloomsbury Dictionary of Idioms. London: Bloomsbury, 2009.,2Kirkpatrick, Elizabeth M. The Wordsworth Dictionary of Idioms. Ware: Wordsworth, 1995.,3Ammer, Christine. American Heritage Dictionary of Idioms. Boston: Houghton Mifflin Harcourt, 2013.
“When I was in the hospital, my family and friends took care of everything from A to Z.”
“We need to go over the plan from A to Z before we begin.”
“I had a book that explained everything from A to Z but I still couldn’t fix my car.”
Used since at least the first half of the 1800’s.
The idiom alludes to the first and last letters of the Roman alphabet. 4Ammer, Christine. American Heritage Dictionary of Idioms. Boston: Houghton Mifflin Harcourt, 2013.
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