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 USA Today, the Newsday, The Washington Post, The New York Times, the LA Times, The Mirror and The Wall Street Journal.

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