Meaning

verb lie adjacent to another or share a boundary

originFrom Middle English abutten, from Old French aboter (“to touch at one end, border on”), abouter (“to join end to end”), abuter (“to buttress, to put an end to”), from a- (“towards”) + bout (“end”), boter, bouter (“to strike”), buter (“to strike, finish”). Equivalent to a- (“towards, change to”) + butt (“push”)

Etymology from Wiktionary, CC BY-SA 3.0