jumping-off place or point
Idioms-
A starting point for a journey or venture, as in This tiny village is the jumping-off place for our trek into the desert . This usage probably alludes to jumping into the water. [Early 1800s]
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A very remote spot; also, the last place to be reached. For example, This was the jumping-off point for the first gold miners in Alaska . [Early 1800s]
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.