- Being in contact at some point or line; joining to; contiguous; bordering: an adjoining room.
1902, Robert B. Ross (ed.), History of the Knaggs family of Ohio and Michigan, page 46:
- The location was described to be "on the lower side of the river, adjoining land owned by Whitmore Knaggs and on the upper side by lands not yet granted."
being in contact at some point
- Present participle of adjoin.