Adjacent means close to or near something. You may consider the people up and down your street to be neighbors, but your next-door neighbor is the person who lives in the house or apartment adjacent to yours.

Adjacent can refer to two things that touch each other or have the same wall or border. And the adjective is often followed by the preposition to: Her office is adjacent to mine. This word is from Latin adjacere "to lie near," from the prefix ad- "to" plus jacere "to lie, throw."

Definitions of adjacent

adj having a common boundary or edge; abutting; touching

conterminous, contiguous, neighboring
joined or linked together

adj nearest in space or position; immediately adjoining without intervening space

“had adjacent rooms”
next, side by side
at or within a short distance in space or time or having elements near each other

adj near or close to but not necessarily touching

“lands adjacent to the mountains”
“New York and adjacent cities”
close, near, nigh
not far distant in time or space or degree or circumstances

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