Answer: The meaning is: sharing a common border; touching. (ADJECTIVE)
SYNONYMS (: adjacent · neighboring · adjoining near · nearby · close )
~hope this has helped, have a gr8 day/night my friend!~
Explanation:
Reviewing of your notes should be your primary concern, then refer to subtle differences?
The last sentence is correct, because the other ones either had periods in the middle or too many commas in them.