"adjacent" in the adjective sense
1. adjacent, next, side by side
nearest in space or position immediately adjoining without intervening space
"had adjacent rooms"
"in the next room"
"the person sitting next to me"
"our rooms were side by side"
2. adjacent, conterminous, contiguous, neighboring
having a common boundary or edge abutting touching Massachusetts and Connecticut"
"Rhode Island has two bordering states
"the side of Germany conterminous with France"
"Utah and the contiguous state of Idaho"
"neighboring cities"
3. adjacent
near or close to but not necessarily touching
"lands adjacent to the mountains"
"New York and adjacent cities"
Source: WordNet® (An amazing lexical database of English)
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