WordReference Random House Learner's Dictionary of American English © 2015
a•but /əˈbʌt/USA pronunciation v., a•but•ted, a•but•ting.

    to be adjacent;
    touch or join at the edge or border: [+ on/upon/against + object]The garden abuts on the next yard.[+ object]The garden abuts the next yard.

Collins Concise English Dictionary © HarperCollins Publishers::

abut /əˈbʌt/ vb (abuts, abutting, abutted)
  1. usually followed by on, upon, or against: to adjoin, touch, or border on (something) at one end
Etymology: 15th Century: from Old French abouter to join at the ends, border on; influenced by abuter to touch at an end, buttress

'abut' also found in these entries:

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