Definition of "col"

We spent half an hour on the summit before returning to our camp, where we stuffed the frozen tent and all the gear into our packs and started the long descent of the southwest ridge to rejoin Harish and others who were still encamped on the col at the foot of it.

1999, Harish Kapadia, “Ascents in the Panch Chuli Group”, in Across Peaks & Passes in Kumaun Himalaya, New Delhi: Indus Publishing Company, page 136

Turn left through a gate in the right angle of the wall and drop down to a col before climbing up the hill.

2019, Alan Staniforth, Cleveland Way, page 74