Share a border with (4)

I believe the answer is:

'share a border with' is the definition.
(I've seen this in another clue)

This is the entire clue.

(Other definitions for abut that I've seen before include "Touch, lean on" , "Adjoin, touch" , "Adjoin at one end" , "Neighbour" , "Lie adjacent to" .)

I've seen this clue in the Newsday, the LA Times, The New York Times, The Washington Post, The Wall Street Journal, The Mirror and the USA Today.

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