noun

1. Something that lies next to something else, especially the side of a right triangle that is neither the hypotenuse nor the opposite.

adjective

1. Lying next to, close, or contiguous; neighboring; bordering on.

   “Because the conference room is filled, we will have our meeting in the adjacent room.”

2. Just before, after, or facing.

   “The picture is on the adjacent page.”

3. Related to; suggestive of; bordering on.

Synonyms: abutting, adjoining, contiguous, juxtaposed, near

preposition

1. Next to; beside.

   “A notice was sent to the house adjacent the school.”

2. Related to; suggestive of; bordering on.